Chinese Ambassador to Mongolia Chai Wenrui (L) delivers samples of COVID-19 vaccines donated by China to Mongolian Deputy Prime Minister Sainbuyan Amarsaikhan during a handover ceremony at the Chinggis Khaan International Airport in Ulan Bator, Mongolia, Feb. 23, 2021. Mongolia on Monday night received 300,000 doses of Sinopharm COVID-19 vaccine donated by China. (Xinhua/Asigang)
