Dongming Petrochemical Group's logo is pictured at its office in Beijing, March 4, 2016. REUTERS/Kim Kyung-Hoon 

Members of staff from the Diwan Palace stand holding pots of tea as Qatar's Emir Sheikh Tamim bin Hamad al-Thani meets with US Secretary of State John Kerry in Doha, August 3, 2015. Kerry is meeting his Gulf Arab counterparts for talks in Qatar as he attempts to ease the concerns of key allies over the Iran nuclear deal. REUTERS/Brendan Smialowski/Pool 

Tea pots are pictured on the ground of the tent where Ahmad, a Syrian man from Idlib, lives with his family near the banks of Nahr Ibrahim river, in Mount Moussa nature reserve July 13, 2015. Ahmad, who has four children, burns wood to make charcoal for a living and lives with his family in the tent by the river banks within the nature reserve. Ahmad makes between $1 and $3 for every kilogram of charcoal he sells. Picture taken July 13, 2015. REUTERS/Alia Haju TPX IMAGES OF THE DAY

Greek Prime Minister Alexis Tsipras (L) and German Chancellor Angela Merkel (R) attend a meeting with European Commission President Jean-Claude Juncker and French President Francois Hollande (not seen) prior to a euro zone leaders summit in Brussels, Belgium, July 7, 2015. Greece faces a last chance to stay in the euro zone on Tuesday when Prime Minister Alexis Tsipras puts proposals to an emergency euro zone summit after Greek voters resoundingly rejected the austerity terms of a defunct bailout. REUTERS/Philippe Wojazer TPX IMAGES OF THE DAY 

A man holds an umbrella and a teapot as he walks through a busy road during a rain shower in Ahmedabad, India, June 24, 2015. This year's monsoon rains in India are officially forecast to be only 88 percent of the long-term average. REUTERS/Amit Dave 

A man takes a nap at an antique shop in Beijing July 31, 2013. REUTERS/Kim Kyung-Hoon (CHINA) 

Teapots are fired at the Portmeirion Factory in Stoke-on-Trent, central England, February 16, 2015. Representatives of some of Britain's biggest firms accuse the Labour party leader Ed Miliband of demonising big business as a way to align himself with ordinary voters. Richard Steele, the non-executive chairman of pottery company Portmeirion which employes 600 people, says it is an easy trick for politicians to point at business and call them fat cats. REUTERS/Darren Staples (BRITAIN - Tags: BUSINESS POLITICS ELECTIONS) 

An Afghan man prepares tea for customers at a roadside tea shop on the outskirts of Jalalabad February 2, 2015. REUTERS/ Parwiz (AFGHANISTAN - Tags: SOCIETY FOOD) 

A Sotheby's employee poses with a Royal Wrcester part cabaret service (dated 1875) at Sotheby's auction house in London May 9, 2014. The piece is estimated to achieve 1,500 British pounds (2,500 U.S. dollars) as part of the Hanley Collection of Teapots which will be auctioned at Sotheby's London on Thursday. REUTERS/Luke MacGregor (BRITAIN - Tags: SOCIETY) 

A rare Royal Worcester jewelled "Countess of Dudley" teapot (3rd R) is pictured with some of the Hanley Collection of Teapots at Sotheby's auction house in London May 9, 2014. The piece is estimated to achieve 6,000 British pounds (10,000 U.S. dollars) as part of the Hanley Collection of Teapots which will be auctioned at Sotheby's London on Thursday. REUTERS/Luke MacGregor (BRITAIN - Tags: SOCIETY) 

A Sotheby's employee poses with teapots from the Hanley Collection of Teapots at Sotheby's auction house in London May 9, 2014. The Hanley Collection of Teapots which will be auctioned at Sotheby's London on Thursday. REUTERS/Luke MacGregor (BRITAIN - Tags: SOCIETY) 

A rare Vauxhall minitature polychrome teapot (dated c.1760) is pictured with some of the Hanley Collection of Teapots at Sotheby's auction house in London May 9, 2014. The piece is estimated to achieve 6,000 British pounds (10,000 U.S. dollars) as part of the Hanley Collection of Teapots which will be auctioned at Sotheby's London on Thursday. REUTERS/Luke MacGregor (BRITAIN - Tags: SOCIETY) 

A Sotheby's employee poses with a Chelsea scolopendrium-moulded teapot (dated c.1750), believed to be the only surviving example of this pattern, at Sotheby's auction house in London May 9, 2014. The piece is estimated to achieve 50,000 British pounds (84,000 U.S. dollars) as part of the Hanley Collection of Teapots which will be auctioned at Sotheby's London on Thursday. REUTERS/Luke MacGregor (BRITAIN - Tags: SOCIETY) 

A Sotheby's employee poses with a Royal Worcester "Aesthetic" teapot (dated 1882) at Sotheby's auction house in London May 9, 2014. The piece is estimated to achieve 2,500 British pounds (4,000 U.S. dollars) as part of the Hanley Collection of Teapots which will be auctioned at Sotheby's London on Thursday. REUTERS/Luke MacGregor (BRITAIN - Tags: SOCIETY TPX IMAGES OF THE DAY) 

Workers stand next to a building shaped like a clay teapot in Wuxi, Jiangsu province March 4, 2014. Located in a suburban area, the teapot shaped building will be a cultural exhibition hall when completed. REUTERS/Carlos Barria (CHINA - Tags: SOCIETY) 

People walk next to a building shaped like a clay teapot in Wuxi, Jiangsu province March 4, 2014. Located in a suburban area, the teapot shaped building will be a cultural exhibition hall when completed. REUTERS/Carlos Barria (CHINA - Tags: SOCIETY) 

An aerial view of a building shaped like a clay teapot is seen in Wuxi, Jiangsu province March 4, 2014. Located in a suburban area, the teapot shaped building will be a cultural exhibition hall when completed. REUTERS/Carlos Barria (CHINA - Tags: SOCIETY TPX IMAGES OF THE DAY) 

Workers stand next to a building shaped like a clay teapot in Wuxi, Jiangsu province March 4, 2014. Located in a suburban area, the teapot shaped building will be a cultural exhibition hall when completed. REUTERS/Carlos Barria (CHINA - Tags: SOCIETY) 

A Free Syrian Army fighter holds a teapot as he runs to avoid snipers in Deir al-Zor, eastern Syria February 4, 2014. Picture taken February 4, 2014. REUTERS/Khalil Ashawi (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

Angelina Teny, wife of South Sudan's rebel leader Riek Machar, carries a teapot in a rebel-controlled territory in Jonglei State February 1, 2014. REUTERS/Goran Tomasevic (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS) 

A Free Syrian Army fighter throws a teapot towards forces loyal to the Syrian regime in Deir al-Zor October 8, 2013. Picture taken October 8, 2013. REUTERS/Khalil Ashawi (SYRIA - Tags: CONFLICT) 

A sign is seen on the Canary Wharf offices of JP Morgan in London September 19, 2013. The "London Whale" trading scandal, once dismissed by JPMorgan Chase & Co CEO Jamie Dimon as a "tempest in a teapot," is costing the largest U.S. bank $920 million in penalties and a rare admission of wrongdoing. REUTERS/Neil Hall (BRITAIN - Tags: BUSINESS) 

A pedestrian walks past the Canary Wharf offices of JP Morgan in London September 19, 2013. The "London Whale" trading scandal, once dismissed by JPMorgan Chase & Co CEO Jamie Dimon as a "tempest in a teapot," is costing the largest U.S. bank $920 million in penalties and a rare admission of wrongdoing. REUTERS/Neil Hall (BRITAIN - Tags: BUSINESS) 

A sign is seen on the Canary Wharf offices of JP Morgan in London September 19, 2013. The "London Whale" trading scandal, once dismissed by JPMorgan Chase & Co CEO Jamie Dimon as a "tempest in a teapot," is costing the largest U.S. bank $920 million in penalties and a rare admission of wrongdoing. REUTERS/Neil Hall (BRITAIN - Tags: BUSINESS) 

Workers are reflected in the windows of the Canary Wharf offices of JP Morgan in London September 19, 2013. The "London Whale" trading scandal, once dismissed by JPMorgan Chase & Co CEO Jamie Dimon as a "tempest in a teapot," is costing the largest U.S. bank $920 million in penalties and a rare admission of wrongdoing. REUTERS/Neil Hall (BRITAIN - Tags: BUSINESS) 

A pedestrian walks past the Canary Wharf offices of JP Morgan in London September 19, 2013. The "London Whale" trading scandal, once dismissed by JPMorgan Chase & Co CEO Jamie Dimon as a "tempest in a teapot," is costing the largest U.S. bank $920 million in penalties and a rare admission of wrongdoing. REUTERS/Neil Hall (BRITAIN - Tags: BUSINESS) 

Workers are reflected in the windows of the Canary Wharf offices of JP Morgan in London September 19, 2013. The "London Whale" trading scandal, once dismissed by JPMorgan Chase & Co CEO Jamie Dimon as a "tempest in a teapot," is costing the largest U.S. bank $920 million in penalties and a rare admission of wrongdoing. REUTERS/Neil Hall (BRITAIN - Tags: BUSINESS) 

A Free Syrian Army fighter fills water in a teapot in Salah al-Din neighbourhood in central Aleppo, August 22, 2013. REUTERS/Muzaffar Salman (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

A man takes a nap at an antique shop in Beijing July 31, 2013.
REUTERS/Kim Kyung-Hoon (CHINA - Tags: SOCIETY) 

A vendor pours coffee into a cup for customers inside his cafe in the old city of Al-Masnaah in Al-Mahaweet, around 110 km (68 miles) north west of capital Sanaa June 27, 2013. REUTERS/Mohamed al-Sayaghi (YEMEN - Tags: SOCIETY) 

A Teapot and cups used by miners are placed on the ground at a mine in Minna, Niger State June 23, 2013. Picture taken June 23, 2013. REUTERS/Afolabi Sotunde (NIGERIA - Tags: ENERGY BUSINESS EMPLOYMENT SOCIETY) 

A member of the Free Syrian Army blows a fire under a teapot, as he stands near curtains used to provide protection from snipers loyal to Syria's President Bashar al-Assad, in Deir al-Zor May 12, 2013. Picture taken May 12, 2013. REUTERS/Khalil Ashawi (SYRIA - Tags: CONFLICT CIVIL UNREST POLITICS SOCIETY) 

Tea pots are seen in a shop at the Tregothnan Estate near Truro in Cornwall, January 14, 2013. Tregothnan is bucking an historic trend by growing tea in England and exporting almost half of it abroad, including to tea-growing nations like China and India. Owned by a descendant of 19th century British Prime Minister Charles Grey, after whom the Earl Grey tea blend was named, the Tregothnan estate has been selling tea since 2005 and currently produces around 10 tonnes a year of tea and infusions. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY BUSINESS) 

A Malian soldier sits on a plank of wood next to a teapot in Niono January 19, 2013. African leaders meeting in Ivory Coast on Saturday are expected to sign off on a regional mission that is due to take over from French forces fighting al Qaeda-linked militants in Mali, but is still short on financing and planning. REUTERS/Joe Penney (MALI - Tags: CIVIL UNREST POLITICS MILITARY CONFLICT) 

A Free Syrian Army fighter takes his position next to a teapot in Qastal Harami area in Aleppo in this picture released December 19, 2012. Picture released December 19, 2012. REUTERS/Saad Al-Jabri (SYRIA - Tags: CONFLICT POLITICS) 

A teapot sits with other debris among reeds after being deposited in a marshy area by the storm surge of superstorm Sandy in the Staten Island borough neighborhood of Oakwood in New York, November 28, 2012. REUTERS/Lucas Jackson (UNITED STATES - Tags: DISASTER ENVIRONMENT) 

Vendors selling tea pots and sculptures sit next to their stalls as they wait for customers at a small market in central Beijing October 11, 2012. China's annual consumer price inflation likely softened to 1.9 percent in September, flirting with July's two-and-a-half year low, with producer prices set to record their steepest drop since October 2009, a Reuters poll of 26 economists found. Easing consumer prices and outright falls in factory gateprices are fresh signs that the world's second-biggest economy is struggling to escape the tug of a global slowdown that has set China on course for its weakest full year of growth since 1999. REUTERS/David Gray (CHINA - Tags: SOCIETY BUSINESS EMPLOYMENT) 

A commemorative cup for the London 2012 Olympic Games sits next to a Big Ben clock tower tea pot in a shop window in London July 23, 2012. REUTERS/Luke MacGregor (BRITAIN - Tags: SPORT OLYMPICS BUSINESS SOCIETY) 

A waiter serves mint tea to tourists in the medina, the old city of Tunis April 21, 2012. After a year of revolutionary turmoil that saw tourists flee the Mediterranean hotspot in droves, Tunisia hopes 2012 will mark the start of the recovery in a sector that used to account for almost 7 percent of gross domestic product and employs 500,000 people, second only to its farming sector. Picture taken April 21, 2012. To match Feature TUNISIA-TOURISM/ REUTERS/Zoubeir Souissi (TUNISIA - Tags: TRAVEL SOCIETY BUSINESS POLITICS) 

A Kashmiri woman carrying traditional teapot called Samovar in a basket on her head walks on the outskirts of Srinagar March 14, 2012. REUTERS/Fayaz Kabli (INDIAN-ADMINISTERED KASHMIR - Tags: SOCIETY PROFILE) 

A worker finishes a finial on top of a crown shaped teapot as part of the Diamond Jubilee Collection at the Emma Bridgewater pottery factory in Stoke-On-Trent, central England February 24, 2012. Queen Elizabeth is celebrating her 60th year on the throne in 2012. REUTERS/Phil Noble (BRITAIN - Tags: SOCIETY ROYALS ENTERTAINMENT FOOD) 

A man uses a gas blow torch to weld parts of a metal teapot together at a workshop in Lahore, February 9, 2012. REUTERS/Mohsin Raza (PAKISTAN - Tags: SOCIETY BUSINESS EMPLOYMENT) 

Buddhist monks carrying kettles run towards the complex to serve tea to the devotees attending a teaching session being addressed by the Tibetan spiritual leader the Dalai Lama on the second day of the Kalachakra festival in the eastern Indian city of Bodhgaya January 2, 2012. The Kalachakra is a 10-day festival comprising Buddha teachings and meditations taking place at Bodhgaya, where Buddha is said to have gained enlightenment. REUTERS/Jitendra Prakash (INDIA - Tags: RELIGION SOCIETY) 

Female inmates make samovars, ornaments and traditional teapots at penal colony number 54 in this January 1992 file photo, the same prison where former Ukrainian Prime Minister Yulia Tymoshenko will be held after being sentenced to seven years for abuse of office, in Kharkiv. Tymoshenko, who was sentenced to seven years in prison for abuse of office, has been moved to prison from a detention centre where she has been held since early August, the state penitentiary service said on Friday. REUTERS/Gleb Garanich/Files (UKRAINE - Tags: POLITICS CRIME LAW) PICTURE TAKEN IN BLACK AND WHITE 

Female inmates make samovars, ornaments and traditional teapots at penal colony number 54 in this January 1992 file photo, the same prison where former Ukrainian Prime Minister Yulia Tymoshenko will be held after being sentenced to seven years for abuse of office, in Kharkiv. Tymoshenko, who was sentenced to seven years in prison for abuse of office, has been moved to prison from a detention centre where she has been held since early August, the state penitentiary service said on Friday. REUTERS/Gleb Garanich/Files (UKRAINE - Tags: POLITICS CRIME LAW) PICTURE TAKEN IN BLACK AND WHITE 

A giant pottery teapot and cup are seen displayed at a public square of tea producer Tan Cuong's village during a tea festival in Vietnam's northern Thai Nguyen province November 12, 2011. Vietnam produced some 109,000 tonnes of tea worth about $167 million between January and October in 2011, with black tea accounting for nearly 80 percent of Vietnam's exports. Pakistan, Taiwan, Russia, China and Indonesia topped the list of Vietnamese tea buyers between January and July, the Agriculture Ministry said. REUTERS/Kham (VIETNAM - Tags: AGRICULTURE BUSINESS COMMODITIES) 

A giant teapot and cup are displayed at the Hoang Binh Tan Cuong tea producing factory in Vietnam's northern Thai Nguyen province November 11, 2011. Vietnam produced 109,000 tonnes of tea worth $167 million between January and October in 2011, and black tea accounts for nearly 80 percent of Vietnam's exports. Pakistan, Taiwan, Russia, China and Indonesia topped the list of Vietnamese tea buyers between January and July, the Agriculture Ministry said. Vietnam is the world's fifth-largest tea exporter and producer. REUTERS/Kham (VIETNAM - Tags: AGRICULTURE BUSINESS COMMODITIES) 

A Taureg man prepares tea during the "Cure Salee" festival in Ingal September 17, 2011. Tuareg, Peul and Wodaabe nomads congregate each year at the salt flats around the northern oasis town of Ingal for the "Cure Salee" (salt cure), where their camels, cattle, sheep and goats drink the mineral-rich water after months on the move. Niger's nomads have held the three-day long event for centuries to mark the end of the rains, exchanging news and information amid music and dance as they prepare their animals over several weeks for the dry season. REUTERS/Luc Gnago (NIGER - Tags: SOCIETY ANNIVERSARY) 

A visitor walks out of the installation 'Little Planetary Harmony' from 2006 by Swiss artist Mai-Thu Perret at the Aargauer Kunsthaus art museum in the town of Aarau west of Zurich May 17, 2011. Perret's exhibition 'The Adding Machine' runs until July 31, 2011. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT) 

Tea is brewed in a traditional Japanese tea pot at a collective centre for evacuees in Otsuchi March 15, 2011. In the fishermen town of Otsuchi in Iwate prefecture, 12,000 out of a population of 15,000 have disappeared following last Friday's massive earthquake and tsunami. REUTERS/Damir Sagolj (JAPAN - Tags: DISASTER ENVIRONMENT) 

Bonhams Ceramics Specialist Nette Megens holds a Meissen porcelain teapot, once owned by the mother of King George I, at Bonhams auction house in London November 22, 2010. The teapot, which dates from 1713-14, is estimated to earn £200,000-£300,000 (US $320,000-$480,000) when it goes on auction November 24 in London. REUTERS/Suzanne Plunkett (BRITAIN - Tags: BUSINESS SOCIETY) 

Bonhams Ceramics Specialist Nette Megens holds a Meissen porcelain teapot, once owned by the mother of King George I, at Bonhams auction house in London November 22, 2010. The teapot, which dates from 1713-14, is estimated to earn £200,000-£300,000 (US $320,000-$480,000) when it goes on auction November 24 in London. REUTERS/Suzanne Plunkett (BRITAIN - Tags: BUSINESS SOCIETY IMAGES OF THE DAY) 

Bonhams Ceramics Specialist Nette Megens holds a Meissen porcelain teapot, once owned by the mother of King George I, at Bonhams auction house in London November 22, 2010. The teapot, which dates from 1713-14, is estimated to earn £200,000-£300,000 (US $320,000-$480,000) when it goes on auction November 24 in London. REUTERS/Suzanne Plunkett (BRITAIN - Tags: BUSINESS SOCIETY) 

Afghan men drink tea at a livestock market in Kabul November 14, 2010. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: SOCIETY IMAGES OF THE DAY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

An Iranian Shi'ite Muslim serves tea as the others attend a mass prayer ceremony before breaking their fast during the month of Ramadan at a mosque in northern Tehran August 27, 2010. REUTERS/Morteza Nikoubazl (IRAN - Tags: RELIGION) 

A man in a camp for displaced flood victims carries a teapot as he walks between rows of tents in Charsadda in Pakistan's northwest Khyber-Pakhtunkhwa Province August 22, 2010. More than $800 million has been donated or pledged to help Pakistan's flood victims, the foreign minister said in Sunday, as hundreds of thousands of people in the south feared more destruction. REUTERS/Tim Wimborne (PAKISTAN - Tags: DISASTER ENVIRONMENT) 

Flood victims, from various parts of Sindh province, make tea outside their tent at a relief camp in the outskirts of Karachi August 16, 2010. REUTERS/Athar Hussain (PAKISTAN - Tags: DISASTER ENVIRONMENT SOCIETY) 

A local girl watches as U.S. Army soldiers from Alpha Company, 2-508 Parachute Infantry Regiment, 4th Brigade Combat Team, conduct a morning patrol through the village of Kowall in Arghandab District, north of Kandahar July 11, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CIVIL UNREST) 

A resident sits next to a samovar, a traditional teapot, in the village of Kashka-Su, some 40 km (25 miles) to the south from Bishkek, June 25, 2010. Nearly 2,000 soldiers filed into polling booths on Friday in Osh, epicentre of the bloodshed, two days before the main round of voting which the interim government hopes will cement its rule of the poor but strategic country. The interim government, which assumed power after a popular revolt in April overthrew the president, says the plebiscite is crucial to restoring order in the south of the country after the violence between ethnic Kyrgyz and Uzbeks. REUTERS/Vladimir Pirogov (KYRGYZSTAN - Tags: POLITICS ELECTIONS SOCIETY) 

Barista Vanessa Ament makes a pour over drip coffee with sun dried Yirgacheffee coffee at Starbucks' Roy Street Coffee and Tea in Seattle, Washington, March 25, 2010. REUTERS/Marcus Donner (UNITED STATES). REUTERS/Marcus Donner (UNITED STATES)