Workers unload groceries at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

A pump attendant carries a box of groceriees into a car at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

A pump attendant wears a mask as he refuels a car at a Sinopec gas station where customers can buy supplies as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

A pump attendant puts a box of groceriees into a car at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

A customer uses an app to order groceries at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

A worker sorts groceries at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

A pump attendant puts a box of groceriees into a car at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

A worker sorts groceries at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

Workers unload groceries at a Sinopec gas station where customers can buy supplies while they refuel as the country is hit by an outbreak of the novel coronavirus, in Beijing, China, February 28, 2020. REUTERS/Thomas Peter

Mariano Ferrari, CEO of Repsol Sinopec Brasil S.A. attends the 2019 OTC Brasil Conference in Rio de Janeiro, Brazil October 29, 2019. REUTERS/Sergio Moraes

Mariano Ferrari, CEO of Repsol Sinopec Brasil S.A. attends the 2019 OTC Brasil Conference in Rio de Janeiro, Brazil October 29, 2019. REUTERS/Sergio Moraes

Map showing the existing and planned petrochemical hubs along China's east coast from PetroChina, Sinopec and other companies.

A pumpjack is seen at the Sinopec-operated Shengli oil field in Dongying, Shandong province, China January 12, 2017. Picture taken January 12, 2017. REUTERS/Chen Aizhu

Fracking trucks are seen at a shale gas well of Sinopec in Nanchuan, Chongqing, China March 18, 2018. Picture taken March 18, 2018. REUTERS/Chen Aizhu

Employees work at a shale gas fracking site of Sinopec in Nanchuan, Chongqing, China March 18, 2018. Picture taken March 18, 2018. REUTERS/Chen Aizhu

Fracking trucks at work are seen at a shale gas well of Sinopec in Nanchuan, Chongqing, China March 18, 2018. Picture taken March 18, 2018. REUTERS/Chen Aizhu

A shale gas drilling rig run by Sinopec is seen in Chongqing, China March 18, 2018. Picture taken March 18, 2018. REUTERS/Chen Aizhu

China’s Sinopec Corp Vice President Huang Wensheng attends a news conference in Hong Kong, China March 26, 2018. REUTERS/Bobby Yip

The company logo of China’s Sinopec Corp is displayed at a news conference in Hong Kong, China March 26, 2018. REUTERS/Bobby Yip

China’s Sinopec Corp Vice Chairman & President Dai Houliang attends a news conference in Hong Kong, China, March 26, 2018. REUTERS/Bobby Yip

A compressing station run by Sinopec is seen at Fuling shale gas field in Chongqing, China December 13, 2017. Picture taken December 13, 2017. REUTERS/Chen Aizhu

A compressing station run by Sinopec is seen at Fuling shale gas field in Chongqing, China December 13, 2017. Picture taken December 13, 2017. REUTERS/Chen Aizhu

A Sinopec-operated LNG storage tank is seen in Fuling district, in Chongqing, China December 13, 2017. Picture taken December 13, 2017. REUTERS/Chen Aizhu

A pressure-boosting station run by Sinopec is seen at Fuling shale gas field in Chongqing, China December 13, 2017. Picture taken December 13, 2017. REUTERS/ Chen Aizhu

Vice chairman and president of China Investment Corporations (CIC) Tu Guangshao, president of Sinopec Group Dai Houliang and chairman of the Board of Directors of the Bank of China Chen Siqing attend signing ceremony and meeting of business leaders with with U.S. President Donald Trump and China's President Xi Jinping at the Great Hall of the People in Beijing, China November 9, 2017. REUTERS/Damir Sagolj

Vice chairman and president of China Investment Corporations (CIC) Tu Guangshao, chairman of the Board of Directors of the Bank of China Chen Siqing and president of Sinopec Group Dai Houliang attend signing ceremony and meeting of business leaders with with U.S. President Donald Trump and China's President Xi Jinping at the Great Hall of the People in Beijing, China November 9, 2017. REUTERS/Damir Sagolj

Leonardo Junqueira, CEO of Repsol Sinopec, talks during an interview in Rio de Janeiro, Brazil, August 11, 2017. REUTERS/Ricardo Moraes

Leonardo Junqueira, CEO of Repsol Sinopec, observes the view after an interview in Rio de Janeiro, Brazil, August 11, 2017. REUTERS/Ricardo Moraes

Leonardo Junqueira, CEO of Repsol Sinopec, observes the view after an interview in Rio de Janeiro, Brazil, August 11, 2017. REUTERS/Ricardo Moraes

Leonardo Junqueira, CEO of Repsol Sinopec, talks during an interview in Rio de Janeiro, Brazil, August 11, 2017. REUTERS/Ricardo Moraes

Leonardo Junqueira, CEO of Repsol Sinopec, talks during an interview in Rio de Janeiro, Brazil, August 11, 2017. REUTERS/Ricardo Moraes

Leonardo Junqueira, CEO of Repsol Sinopec, talks during an interview in Rio de Janeiro, Brazil, August 11, 2017. REUTERS/Ricardo Moraes

FILE PHOTO: Oil tanks are seen at a Sinopec plant in Hefei, Anhui province, May 31, 2009. REUTERS/Jianan Yu/File Photo

A Sinopec sign displayed at its gas station is seen behind a Chinese New Year lantern installation in Hong Kong February 5, 2013. REUTERS/Bobby Yip/File Photo

Cars wait to take on fuel at a Sinopec gas station in Beijing, China, February 3, 2016. REUTERS/Kim Kyung-Hoon/File Photo GLOBAL BUSINESS WEEK AHEAD - SEARCH "GLOBAL BUSINESS AUG 22" FOR ALL IMAGES

File Photo - A Sinopec sign displayed at its gas station is seen behind a Chinese New Year lantern installation in Hong Kong in this February 5, 2013 file photo. REUTERS/Bobby Yip/File Photo

Cars wait to fill with fuel at Sinopec's fuel station in Beijing, China, February 3, 2016. REUTERS/Kim Kyung-Hoon/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH 'BUSINESS WEEK AHEAD APRIL 25' FOR ALL IMAGES

Sinopec Corp President Li Chunguang attends a news conference on the company's annual results in Hong Kong, China March 30, 2016. REUTERS/Bobby Yip

Sinopec Corp Chairman Wang Yupu attends a news conference on the company's annual results in Hong Kong, China March 30, 2016. REUTERS/Bobby Yip

Sinopec Corp Chairman Wang Yupu attends a news conference on the company's annual results in Hong Kong, China March 30, 2016. REUTERS/Bobby Yip

Sinopec Corp Chairman Wang Yupu attends a news conference on the company's annual results in Hong Kong, China March 30, 2016. REUTERS/Bobby Yip

Sinopec Corp Chairman Wang Yupu attends a news conference on the company's annual results in Hong Kong, China March 30, 2016. REUTERS/Bobby Yip

A Sinopec sign displayed at its gas station is seen behind a Chinese New Year lantern installation in Hong Kong in this February 5, 2013 file photo. REUTERS/Bobby Yip/Files

Cars wait to take on fuel at a Sinopec gas station in Beijing, China, February 3, 2016. Unleaded petrol is priced at 5.56 yuan ($0.85) per litre. A dramatic drop in oil prices, driven down by a glut in supply, is translating into a mixed bag for motorists. All countries have access to the same oil prices on international markets, but retail prices vary wildly, largely because of taxes and subsidies. REUTERS/Kim Kyung-Hoon SEARCH "THE WIDER IMAGE" FOR ALL STORIES

Cars wait to fill with fuel at Sinopec's fuel station in Beijing, China, February 3, 2016. The price per litre of basic unleaded oil on the day is 5.56RMB (0.84USD).REUTERS/Kim Kyung-Hoon

A customer walks in an Easy Joy store at a Sinopec gas station in Nanjing, Jiangsu province April 30, 2014. Unlike in Western markets, where non-fuel businesses - convenience stores plus things like fast food or car washing - can account for more than half of a filling station's profits, more than 99 percent of Sinopec's retail sales come from petrol. Picture taken April 30, 2014. REUTERS/Sean Yong (CHINA - Tags: BUSINESS ENERGY)

A worker cleans up leaked oil after last week's explosion of a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 25, 2013. China has launched a broad investigation into safety at oil and gas pipelines, state media reported on Monday, as the death toll from an explosion at a Sinopec pipeline last week rose to 52. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY ENVIRONMENT)

A worker cleans up leaked oil after last week's explosion of a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 25, 2013. China has launched a broad investigation into safety at oil and gas pipelines, state media reported on Monday, as the death toll from an explosion at a Sinopec pipeline last week rose to 52. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY ENVIRONMENT)

Workers clean up leaked oil after last week's explosion of a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 25, 2013. China has launched a broad investigation into safety at oil and gas pipelines, state media reported on Monday, as the death toll from an explosion at a Sinopec pipeline last week rose to 52. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY ENVIRONMENT)

Oil fences to control leaked oil are seen after last week's explosion of a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 25, 2013. China has launched a broad investigation into safety at oil and gas pipelines, state media reported on Monday, as the death toll from an explosion at a Sinopec pipeline last week rose to 52. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY ENVIRONMENT)

Rescue workers search for missing people on a damaged road after last week's explosion of a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 25, 2013. China has launched a broad investigation into safety at oil and gas pipelines, state media reported on Monday, as the death toll from an explosion at a Sinopec pipeline last week rose to 52. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY)

A worker cleans up leaked oil after last week's explosion of a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 25, 2013. China has launched a broad investigation into safety at oil and gas pipelines, state media reported on Monday, as the death toll from an explosion at a Sinopec pipeline last week rose to 52. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY)

Workers carry buckets of degreaser to clean leaked oil after Friday's explosion at a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 24, 2013. Crude pipelines have been shut-off in the eastern Chinese oil hub of Qingdao pending safety checks a day after a leak triggered a huge explosion that killed 47 people, a refinery official and state media said on Saturday. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY ENVIRONMENT BUSINESS)

Workers set up oil fences to control leaked oil after Friday's explosion at a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 24, 2013. Crude pipelines have been shut-off in the eastern Chinese oil hub of Qingdao pending safety checks a day after a leak triggered a huge explosion that killed 47 people, a refinery official and state media said on Saturday. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY ENVIRONMENT BUSINESS)

A worker cleans up leaked oil after Friday's explosion at a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 24, 2013. Crude pipelines have been shut-off in the eastern Chinese oil hub of Qingdao pending safety checks a day after a leak triggered a huge explosion that killed 47 people, a refinery official and state media said on Saturday. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY BUSINESS ENVIRONMENT)

Workers set up oil fences to control leaked oil after Friday's explosion at a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 24, 2013. Crude pipelines have been shut-off in the eastern Chinese oil hub of Qingdao pending safety checks a day after a leak triggered a huge explosion that killed 47 people, a refinery official and state media said on Saturday. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY ENVIRONMENT BUSINESS)

Workers set up oil fences to control leaked oil after Friday's explosion at a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 24, 2013. Crude pipelines have been shut-off in the eastern Chinese oil hub of Qingdao pending safety checks a day after a leak triggered a huge explosion that killed 47 people, a refinery official and state media said on Saturday. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY BUSINESS ENVIRONMENT)

A worker cleans up leaked oil after Friday's explosion at a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 24, 2013. Crude pipelines have been shut-off in the eastern Chinese oil hub of Qingdao pending safety checks a day after a leak triggered a huge explosion that killed 47 people, a refinery official and state media said on Saturday. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY BUSINESS ENVIRONMENT)

Oil fences to control leaked oil are seen after Friday's explosion at a Sinopec Corp oil pipeline in Huangdao, Qingdao, Shandong Province November 24, 2013. Crude pipelines have been shut-off in the eastern Chinese oil hub of Qingdao pending safety checks a day after a leak triggered a huge explosion that killed 47 people, a refinery official and state media said on Saturday. REUTERS/Aly Song (CHINA - Tags: DISASTER ENERGY BUSINESS)