Panda twin cubs Paule (Meng Yuan), Pit (Meng Xiang) and mother panda Meng Meng are seen in their enclosure in the zoo, during the spread of coronavirus disease (COVID-19) in Berlin, Germany, April 2, 2020. REUTERS/Annegret Hilse

Panda twin cubs Paule (Meng Yuan), Pit (Meng Xiang) and mother panda Meng Meng are seen in their enclosure in the zoo, during the spread of coronavirus disease (COVID-19) in Berlin, Germany, April 2, 2020. REUTERS/Annegret Hilse

Panda twin cubs Paule (Meng Yuan), Pit (Meng Xiang) and mother panda Meng Meng are seen in their enclosure in the zoo, during the spread of coronavirus disease (COVID-19) in Berlin, Germany, April 2, 2020. REUTERS/Annegret Hilse

A man speaks on his phone on the rooftop of Chinese businessman Kang Quiang's casino Dong Yuan, in Sihanoukville, Cambodia, February 28, 2020. REUTERS/Jorge Silva SEARCH "COVID-19 CAMBODIA CASINOS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Golden urinals stand inside Chinese businessman Kang Quiang's casino Dong Yuan, in Sihanoukville, Cambodia, February 28, 2020. REUTERS/Jorge Silva SEARCH "COVID-19 CAMBODIA CASINOS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Kang Qiang, a Chinese businessman, sits in his office at his casino Dong Yuan, in Sihanoukville, Cambodia, February 28, 2020. REUTERS/Jorge Silva SEARCH "COVID-19 CAMBODIA CASINOS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Cast members Ron Yuan, Yifei Liu, Jason Scott Lee and Yoson An pose with director Niki Caro, at the European premiere for the film "Mulan" in London, Britain March 12, 2020. REUTERS/Henry Nicholls

Cast member Ron Yuan poses at the European premiere for the film "Mulan" in London, Britain March 12, 2020. REUTERS/Henry Nicholls

Cast members Ron Yuan, Yifei Liu, Jason Scott Lee and Yoson An pose with director Niki Caro, at the European premiere for the film "Mulan" in London, Britain March 12, 2020. REUTERS/Henry Nicholls

Cast members Ron Yuan, Yifei Liu, Jason Scott Lee and Yoson An pose with director Niki Caro, at the European premiere for the film "Mulan" in London, Britain March 12, 2020. REUTERS/Henry Nicholls

A test tube labelled with the coronavirus is placed on U.S. dollar and yuan banknotes, in this illustration taken on March 1, 2020. REUTERS/Dado Ruvic

A test tube labelled with the coronavirus is seen in front of U.S. dollar and yuan banknotes, in this illustration taken on March 1, 2020. REUTERS/Dado Ruvic

A test tube labelled with the coronavirus is seen in front of yuan banknotes, in this illustration taken on March 1, 2020. REUTERS/Dado Ruvic

A test tube labelled with the coronavirus is seen in front of U.S. dollar and yuan banknotes, in this illustration taken on March 1, 2020. REUTERS/Dado Ruvic

A test tube labelled with the coronavirus is seen in front of U.S. dollar, yuan and pound banknotes, in this illustration taken on March 1, 2020. REUTERS/Dado Ruvic

Chinese Yuan and U.S. dollar banknotes are seen behind illuminated stock graph in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen behind illuminated stock graph in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan banknotes are seen behind illuminated stock graph in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen behind illuminated stock graph in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan banknotes are seen behind illuminated stock graph in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan and U.S. dollar banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Chinese Yuan banknotes are seen in this illustration taken February 10, 2020. REUTERS/Dado Ruvic/Illustration

Representations of Bitcoin, Saudi riyal, yuan, Turkish lira, pound, U.S. dollar, ruro and Jordanian dinar banknotes are seen in this illustration taken January 6, 2020. REUTERS/Dado Ruvic/Illustration

Saudi riyal, yuan, Turkish lira, pound, U.S. dollar, euro and Jordanian dinar banknotes are seen in this illustration taken January 6, 2020. REUTERS/Dado Ruvic/Illustration

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) are carried by their zookeepers during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

A cameraman is seen with panda doll as panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) appear for the first time in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) are seen during their first appearence in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) are carried by their zoo keepers during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Panda twin cubs Paule (Meng Yuan) and Pit (Meng Xiang) and mother panda Meng Meng are seen during their first appearance in their enclosure at the Berlin Zoo in Berlin, Germany January 29, 2020. REUTERS/Fabrizio Bensch REFILE - CORRECTING YEAR

Women pray at Jin De Yuan temple ahead of the Chinese Lunar New Year in Jakarta, Indonesia, January 23, 2020. REUTERS/Willy Kurniawan

A worker looks from a door of Jin De Yuan temple ahead of the Chinese Lunar New Year in Jakarta, Indonesia, January 23, 2020. REUTERS/Willy Kurniawan

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke TPX IMAGES OF THE DAY

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke

Panda cubs Meng Yuan and Meng Xiang are seen during a news conference to announce their names at the Berlin Zoo in Berlin, Germany, December 9, 2019. REUTERS/Hannibal Hanschke