President Joe Biden and first lady Jill Biden mark the 80th anniversary of the Japanese attack on Pearl Harbor with a visit to the World War II Memorial, on Tuesday, in Washington. (Photo: CFP)

People visit The Memorial for The Murdered Jews of Europe, the so-called Holocaust Memorial during snowfall in Berlin, Germany, on Thursday. (Photo: CFP)

A passenger takes selfies in front of a high-speed train bound for Nanchang of East China's Jiangxi Province at Shenzhen North Station in Shenzhen, South China's Guangdong Province, on Friday. (Photo: Xinhua)

A vendor carries balloons for sale as he walks through a street in Ahmedabad, India, on Thursday. (Photo: CFP)

Fengxian Temple, an iconic cave in the renowned Longmen Grottoes in Luoyang, Henan Province, is undergoing a major preservation and restoration project on Monday. It is the largest such project in 50 years, as ancient statues in the cave face problems with unstable peripheral rocks and water seepage. (Photo: China Daily)

The Sagrada Familia basilica is pictured during the inauguration of its second-highest tower, which is dedicated to the Virgin Mary, on Wednesday, in Barcelona. (Photo: AFP)

Police officers ride a horse-drawn sleigh to pay regular visits to residents in their areas after heavy snowfall in Altay, Xinjiang Uygur Autonomous Region on Wednesday. (Photo: IC)

Ukrainian soldiers walk at the line of separation from pro-Russian rebels near Katerinivka, Donetsk region, Ukraine, on Tuesday. (Photo: CFP)

Firefighters work to contain a blaze during a drill in Wenchuan County, Sichuan Province, on Tuesday. (Photo: China Daily)

Flowers are seen along the road in Nanning, the capital of South China's Guangxi Zhuang Autonomous Region on Tuesday. (Photo: Xinhua)