U.S.-born male giant panda Bei Bei is seen before his departure at the Smithsonian’s National Zoo

(191119) -- WASHINGTON, Nov. 19, 2019 (Xinhua) -- U.S.-born male giant panda Bei Bei is seen before his departure at the Smithsonian's National Zoo in Washington D.C., the United States, on Nov. 19, 2019. The 4-year-old giant panda Bei Bei, who was born and raised at the Smithsonian's National Zoo, departed for China on Tuesday. (Xinhua/Liu Jie)

(191119) — WASHINGTON, Nov. 19, 2019 (Xinhua) — U.S.-born male giant panda Bei Bei is seen before his departure at the Smithsonian’s National Zoo in Washington D.C., the United States, on Nov. 19, 2019. The 4-year-old giant panda Bei Bei, who was born and raised at the Smithsonian’s National Zoo, departed for China on Tuesday. (Xinhua/Liu Jie)