Migrants and refugees are seen behind a wired fence at the border between Greece and Turkey near the closed Kastanies border crossing in northeastern Greece, where thousands gathered near the Evros River in an attempt to cross into Greece on Monday. (Photo: Xinhua)

A protester painted his face with the tricolor national flag and participated in a protest against the controversial new citizenship law in New Delhi, India, on Tuesday. The death toll during the four-day communal violence in the Indian capital city rose to 46 on Sunday, officials said. (Photo: Xinhua)

Doctor Liu Kai and the 87-year-old patient enjoy the sunset view on their way for a CT scan at the Renmin Hospital of Wuhan University in Wuhan, central China's Hubei Province, on Thursday. (Photo: CCTV)

Ma Long and Xu Xin from China compete during the men's doubles quarterfinal match against Harimoto Tomokazu and Morizonoo Masataka from Japan at the 2020 ITTF Qatar Open in Doha, Qatar on Friday. (Photo: Xinhua)

Artists perform at the Kaziukas Fair in Vilnius, Lithuania, on Friday. The Kaziukas Fair celebrates the beginning of spring and is one of the biggest fairs of handmade works in Lithuania. It is held from March 6 to March 8 this year. (Photo: Xinhua)

Pedestrians wearing masks walk in the street at Ginza in Tokyo, Japan, on Friday. (Photo: Xinhua)

Post-90s frontline nurses draws on colleagues’ protective suits to boost morale. All the drawings are done during their breaks. They also tailored the pattern to the personality of the person wearing it. (Photo: Xinhua)

Cherry blossoms accent the fog-shrouded landscape of a tea plantation in Yongfu county, Zhangzhou City in East China's Fujian Province on Tuesday. (Photo: Chinadaily.com)

Dancers of a local ballet troupe demonstrate movements during an open course on live stream in east China's Shanghai on Wednesday. Due to the novel coronavirus outbreak, the art group has canceled its on-site open course and moved it online. (Photo: Xinhua)

This file illustration obtained on March 5, 2020 courtesy of NASA shows the Mars rover Perseverance. NASA on March 5, 2020 announced the name of its next Mars rover: Perseverance. It will be the fifth exploratory vehicle on the Red Planet following in the tire tracks of the similarly augustly titled Sojourner, Spirit, Opportunity, and Curiosity. (Photo: Ecns)