People visit Yad Vashem Holocaust Memorial Museum in Jerusalem, on Tuesday. The United Nations in 2005 designated Jan. 27 as an annual International Day of Commemoration in memory of the victims of the Holocaust. (Photo: Xinhua)

Lyu Jun (L), a member of a medical team leaving for Wuhan of Hubei Province, says goodbye to his family at Xinjiang Medical University in Urumqi, Northwest China's Xinjiang Uygur Autonomous Region, on Wednesday. (Photo: Xinhua)

Big Ben is projected onto the wall of 10 Downing Street in London, Britain, on Saturday. Britain officially left the European Union (EU) at 11 pm (2300 GMT) Friday, marking a historic end of its 47-year-long membership of the world's largest trading bloc. (Photo: Xinhua)

Novak Djokovic of Serbia celebrates after winning the men's singles semifinal match against Roger Federer of Switzerland at the Australian Open tennis tournament in Melbourne, Australia, on Thursday. (Photo: Xinhua)

Volunteers feed a koala at Adelaide Koala Rescue in Adelaide, Australia, on Monday. (Photo: Xinhua)

Children take part in a painting workshop during the Chinese Lunar New Year celebrations in Riga, Latvia, on Monday. (Photo: Xinhua)

A tourist takes photos of Chinese lanterns at a temple in Bangkok, Thailand, on Tuesday. (Photo: Xinhua)

Aerial photo taken on Friday shows buildings illuminated with slogans reading "Come on, Wuhan" to raise morale in the capital of Central China's Hubei Province. (Photo: Xinhua)

Photo taken on Wednesday shows the memorials near the Staples Center to pay respect to Kobe Bryant, in Los Angeles, California, the United States. Retired NBA star Kobe Bryant was one of nine people killed in a helicopter crash amid foggy conditions in the hills above Calabasas, southern California, on Jan. 26, 2020. (Photo: Xinhua)

People take part in a protest against the announced US Middle East peace plan in Amman, Jordan, on Friday. (Photo: Xinhua)