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BERLIN, GERMANY - JULY 05: The Panda Jiao Quing eats during the opening ceremony the new panda enclosure for viewing at Zoo Berlin on July 5, 2017 in Berlin, Germany. The two pandas, Meng Meng and Jiao Qing, are on loan from China for the next 15 years. (Photo by Michele Tantussi-Pool/Getty Images)

BERLIN, GERMANY - JULY 05: The Panda Jiao Quing eats during the opening ceremony the new panda enclosure for viewing at Zoo Berlin on July 5, 2017 in Berlin, Germany. The two pandas, Meng Meng and Jiao Qing, are on loan from China for the next 15 years. (Photo by Michele Tantussi-Pool/Getty Images)

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China's President Xi Jinping (L) and German Chancellor Angela Merkel watch Meng Meng, one of the two new pandas during the welcoming ceremony for two panda bears at the Zoologischer Garten zoo in Berlin on July 5, 2017. Chinese President Xi Jinping joins German Chancellor Angela Merkel to unveil pandas Meng Meng and Jiao Qing loaned by Beijing to Berlin zoo in a sign of friendly ties. / AFP PHOTO / POOL / AXEL SCHMIDT (Photo credit should read AXEL SCHMIDT/AFP/Getty Images)

China's President Xi Jinping (L) and German Chancellor Angela Merkel watch Meng Meng, one of the two new pandas during the welcoming ceremony for two panda bears at the Zoologischer Garten zoo in Berlin on July 5, 2017.
Chinese President Xi Jinping joins German Chancellor Angela Merkel to unveil pandas Meng Meng and Jiao Qing loaned by Beijing to Berlin zoo in a sign of friendly ties. / AFP PHOTO / POOL / AXEL SCHMIDT        (Photo credit should read AXEL SCHMIDT/AFP/Getty Images)

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BERLIN, GERMANY - JULY 05: The Panda Meng Meng eats during the opening ceremony the new panda enclosure for viewing at Zoo Berlin on July 5, 2017 in Berlin, Germany. The two pandas, Meng Meng and Jiao Qing, are on loan from China for the next 15 years. (Photo by Michele Tantussi-Pool/Getty Images)

BERLIN, GERMANY - JULY 05: The Panda Meng Meng eats during the opening ceremony the new panda enclosure for viewing at Zoo Berlin on July 5, 2017 in Berlin, Germany. The two pandas, Meng Meng and Jiao Qing, are on loan from China for the next 15 years. (Photo by Michele Tantussi-Pool/Getty Images)

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Meng Meng, one of the two new pandas enjoys some bambus on July 5, 2017 during an official welcoming ceremony for two panda bears at the Zoologischer Garten zoo in Berlin. Chinese President Xi Jinping joined German Chancellor Angela Merkel to unveil pandas Meng Meng and Jiao Qing loaned by Beijing to Berlin zoo in a sign of friendly ties. / AFP PHOTO / Tobias SCHWARZ (Photo credit should read TOBIAS SCHWARZ/AFP/Getty Images)

Meng Meng, one of the two new pandas enjoys some bambus on July 5, 2017 during an official welcoming ceremony for two panda bears at the Zoologischer Garten zoo in Berlin.
Chinese President Xi Jinping joined German Chancellor Angela Merkel to unveil pandas Meng Meng and Jiao Qing loaned by Beijing to Berlin zoo in a sign of friendly ties. / AFP PHOTO / Tobias SCHWARZ        (Photo credit should read TOBIAS SCHWARZ/AFP/Getty Images)

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China's President Xi Jinping (L) and German Chancellor Angela Merkel watch Meng Meng, one of the two new pandas during the welcoming ceremony for two panda bears at the Zoologischer Garten zoo in Berlin on July 5, 2017. Chinese President Xi Jinping joins German Chancellor Angela Merkel to unveil pandas Meng Meng and Jiao Qing loaned by Beijing to Berlin zoo in a sign of friendly ties. / AFP PHOTO / POOL / AXEL SCHMIDT (Photo credit should read AXEL SCHMIDT/AFP/Getty Images)

China's President Xi Jinping (L) and German Chancellor Angela Merkel watch Meng Meng, one of the two new pandas during the welcoming ceremony for two panda bears at the Zoologischer Garten zoo in Berlin on July 5, 2017.
Chinese President Xi Jinping joins German Chancellor Angela Merkel to unveil pandas Meng Meng and Jiao Qing loaned by Beijing to Berlin zoo in a sign of friendly ties. / AFP PHOTO / POOL / AXEL SCHMIDT        (Photo credit should read AXEL SCHMIDT/AFP/Getty Images)