A student walks past a picture at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

A student walks past a picture at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in a physical education class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in a physical education class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in a Tai Chi class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in a Go class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in a Tai Chi class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in a Tai Chi class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in a Go class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in an electronic organ class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in an electronic organ class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students participate in an electronic organ class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students dance at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students dance at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students dance at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students dance at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students perform Peking Opera at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students perform Peking Opera at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students are pictured during a Chinese class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students are pictured during a Chinese class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students are pictured during a Chinese class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students are pictured during a Chinese class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students are pictured in a Chinese class at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Students play traditional music at Changchun Street Primary School of Wuhan during a government-organized media tour following the coronavirus disease (COVID-19) outbreak, in Wuhan, Hubei province, China, September 4, 2020. REUTERS/Aly Song 

Chinese Navy's destroyer Changchun takes part in a naval parade off the eastern port city of Qingdao, to mark the 70th anniversary of the founding of Chinese People's Liberation Army Navy, China, April 23, 2019. REUTERS/Jason Lee 

People gather at the gate of Changchun Changsheng Bio-technology Co Ltd, the Chinese vaccine maker, in Changchun, China July 26, 2018. REUTERS/Philip Wen 

A North Korean vendor sits at her store selling North Korean medicine and toothpaste at the China-Northeast Asia Expo in Changchun, China September 1, 2017. REUTERS/Sue-Lin Wong 

North Korean vendors stand at their stall selling rocks and musical instruments at the China-Northeast Asia Expo in Changchun, China September 1, 2017. REUTERS/Sue-Lin Wong 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China, - 4/3/17 - SIPG's Brazilian forward Hulk in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China, - 4/3/17 - SIPG's Brazilian forward Hulk (L) in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China - 4/3/17 - SIPG's Elkeson celebrates after scoring. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC - Shanghai, China - 4/3/17 - SIPG's players celebrate victory after match. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC - Shanghai, China - 4/3/17 - SIPG's Brazilian midfielder Oscar celebrates after the match. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC - Shanghai, China, - 4/3/17 - SIPG's Brazilian midfielder Oscar (R) in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China, - 4/3/17 - SIPG's Brazilian midfielder Oscar in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC - Shanghai, China, - 4/3/17 - SIPG's Brazilian midfielder Oscar in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC - Shanghai, China - 4/3/17 - SIPG's Elkeson celebrates after scoring. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China - 4/3/17 - SIPG's coach Andre Villas-Boas. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China, - 4/3/17 - SIPG's Brazilian forward Hulk in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China, - 4/3/17 - SIPG's Brazilian midfielder Oscar in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China, - 4/3/17 - SIPG's Hulk in action. REUTERS/Aly Song 

Football Soccer - Chinese Super League - SIPG v Changchun Yatai FC -Shanghai, China, - 4/3/17 - SIPG's Brazilian forward Hulk in action. REUTERS/Aly Song 

Ma Jiaqi, 5, and her mother arrive at Beijing Railway Station for their train to Changchun of Jilin province, in Beijing, China, January 25, 2016. According to traffic police, over 2.9 billion trips will be made around China during the 40-day Spring Festival travel rush, which started on January 24. REUTERS/Jason Lee TPX IMAGES OF THE DAY

(Front row, L to R) China's President Hu Jintao, China's former President Jiang Zemin, China's Premier Wen Jiabao, Standing Committee of the Political Bureau member Li Changchun and China's Vice-Premier Li Keqiang raise their hands as they take a vote at the closing session of the 18th National Congress of the Communist Party of China, at the Great Hall of the People in Beijing, November 14, 2012. China's Communist Party congress offered the first clues on a generational leadership change on Wednesday as Xi Jinping and Li Keqiang took the first step to the presidency and premiership, respectively. The 2,270 carefully vetted delegates cast their votes behind closed doors in Beijing's cavernous Great Hall of the People for the new Central Committee, a ruling council with around 200 full members and 170 or so alternate members with no voting rights. REUTERS/Jason Lee (CHINA - Tags: POLITICS TPX IMAGES OF THE DAY) 

Li Changchun, a member of China's Standing Committee of the Political Bureau (L) speaks to Britain's Prime Minister David Cameron during their meeting at number 10 Downing Street in London April 17, 2012. REUTERS/Leon Neal/pool (BRITAIN - Tags: POLITICS) 

Li Changchun, a member of China's Standing Committee of the Political Bureau (L) shakes hands with Britain's Prime Minister David Cameron at number 10 Downing Street in London April 17, 2012. REUTERS/Leon Neal/pool (BRITAIN - Tags: POLITICS) 

Li Changchun, a member of China's Standing Committee of the Political Bureau (L) gestures as he speaks to Britain's Prime Minister David Cameron during their meeting at number 10 Downing Street in London April 17, 2012. REUTERS/Leon Neal/pool (BRITAIN - Tags: POLITICS) 

Li Changchun, head of propaganda and member of the Politburo Standing Committee of the Communist Party of China, gestures as he arrives at a China market focus event at the London Book Fair April 15, 2012. REUTERS/Paul Hackett (BRITAIN - Tags: POLITICS BUSINESS SOCIETY) 

Li Changchun, head of propaganda and member of the Politburo Standing Committee of the Communist Party of China, speaks at a China market focus event at the London book fair April 15, 2012. REUTERS/Paul Hackett (BRITAIN - Tags: POLITICS BUSINESS SOCIETY) 

Britain's Prince Andrew, Duke of York, (L) looks on as Politburo member Liu Yandong (R) and Li Changchun, head of propaganda and member of the Politburo Standing Committee of the Communist Party of China, launch a China market focus event at the London book fair April 15, 2012. REUTERS/Paul Hackett (BRITAIN - Tags: POLITICS ROYALS BUSINESS SOCIETY) 

Li Changchun, head of propaganda and member of the Politburo Standing Committee of the Communist Party of China, speaks at a China market focus event at the London book fair April 15, 2012. REUTERS/Paul Hackett (BRITAIN - Tags: POLITICS BUSINESS SOCIETY) 

Member of China's Politburo Liu Yandong (L) applauds the fifth ranked member of the Politburo Standing Committee of the Communist Party of China and head of propaganda, Li Changchun (R) as they arrive at the China market focus event at the London book fair April 15, 2012. REUTERS/Paul Hackett (BRITAIN - Tags: POLITICS SOCIETY BUSINESS) 

Paramilitary police stand guard the entrance of the South Lake Hotel where reclusive North Korean leader Kim Jong-il is rumoured to be staying in Changchun, Jilin province, China on May 21, 2011. A secretive convoy from North Korea reached the northeast Chinese city of Changchun on Saturday, in what may be the latest stop by the North's ruler Kim Jong-il as he seeks to shore up ties with his country's sole major supporter. REUTERS/Aly Song (CHINA - Tags: POLITICS) 

Police guard a section of road blocked outside the South Lake Hotel where reclusive North Korean leader Kim Jong-il is rumoured to be staying in Changchun, Jilin province, China on May 21, 2011. A secretive convoy from North Korea reached the northeast Chinese city of Changchun on Saturday, in what may be the latest stop by the North's ruler Kim Jong-il as he seeks to shore up ties with his country's sole major supporter. REUTERS/Aly Song (CHINA - Tags: POLITICS) 

Police guard a section of road blocked outside the South Lake Hotel where reclusive North Korean leader Kim Jong-il is rumoured to be staying in Changchun, Jilin province, China on May 21, 2011. A secretive convoy from North Korea reached the northeast Chinese city of Changchun on Saturday, in what may be the latest stop by the North's ruler Kim Jong-il as he seeks to shore up ties with his country's sole major supporter. REUTERS/Aly Song (CHINA - Tags: POLITICS) 

A limousine believed to be carrrying North Korean leader Kim Jong-il travels at speed towards the South Lake Hotel in Changchun, Jilin province, China on May 21, 2011.
REUTERS/Aly Song (CHINA - Tags: POLITICS) 

Police and security personnel leave the the train station in Changchun, Jilin province, China after the departure of a vehicle convoy believed to be carrying North Korean leader Kim Jong-il on May 21, 2011. Picture taken through window. REUTERS/Aly Song (CHINA - Tags: POLITICS) 

A vehicle convoy believed to be carrying North Korean leader Kim Jong-il leaves the train station in Changchun, Jilin province, China May 21, 2011. Picture taken through window. REUTERS/Aly Song (CHINA - Tags: POLITICS) 

A vehicle convoy believed to be carrying North Korean leader Kim Jong-il leaves the train station in Changchun, Jilin province, China May 21, 2011. Picture taken through window. REUTERS/Aly Song (CHINA - Tags: POLITICS) 

China's Politburo Standing Committee member Li Changchun speaks with Slovenia's President Danilo Turk (not pictured) in Ljubljana, April 15, 2011. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: POLITICS)