Fighter aircraft spew contrails in the colors of the Russian flag over the Gasr Al Watan Palace for the arrival of Russian President Vladimir Putin in Abu Dhabi on October 15, 2019 in Abu Dhabi, United Arab Emirates. (Photo: Xinhua)

Advance space suit engineer Kristine Davis waves next to lead engineer of the Orion Crew survival systems, Dustin Gohmert (R) during a press conference displaying the next generation of space suits as parts of the Artemis program in Washington, DC on Wednesday. (Photo: Xinhua)

The Brandenburg Gate is illuminated during the Festival of Lights show in Berlin, Germany, on Tuesday. (Photo: VCG)

People protest against the Brexit deal outside the European Commission in Brussels, Belgium, on Thursday. (Photo: Xinhua)

Flowers bloom at Floriade, an annual flower and entertainment festival at the Commonwealth Park in Canberra, Australia, on Monday. (Photo: Xinhua)

The national flag of the People's Republic of China and the flag of the International Military Sports Council (CISM) are carried into the stadium during the opening ceremony of the 7th CISM Military World Games in Wuhan, capital of central China's Hubei Province, on Friday. (Photo: Xinhua)

Aerial view of the trees of populus euphratica in Jiuquan City, Gansu Province, northwest China, on Monday. (Photo: VCG)

Farmers sail in a canal covered with lily plants to collect pink flowers in Barisal, Bangladesh, on Wednesday. (Photo: VCG)

Friday marks the 159th anniversary of the destruction of the Old Summer Palace, also known as Yuanmingyuan, located in Chinese capital Beijing. To commemorate the historical event, the palace won't charge admission fee on that day. (Photo: VCG)

Panama's Embera community cooked the world's largest patacon, which entered the Guinness World Records on World Food Day, on Wednesday.(Photo: VCG)