Wang Kaihua of China cools down during the men's 20km race walk at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Gang)

Visitors walk on a plank road built on the cliff at the Cinnabar tourism town in Wanshan District of Tongren, southwest China's Guizhou Province, Oct. 5, 2019. (Xinhua/Yang Wenbin)

The multi-exposure picture shows Liang Jianhao (L) of China competes with his teammate Xu Yingming during the men's sabre final at the 2019 China Fencing Masters in Nanchang, east China's Jiangxi Province, Oct. 5, 2019. (Xinhua/Wan Xiang)

Athletes compete during the men's 3000m steeplechase final at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 4, 2019. (Xinhua/Li Ming)

The underwater photo taken on Oct. 4, 2019 shows a clownfish swimming around sea anemones at the Boundary Island Tourist Attraction in Lingshui County, south China's Hainan Province. (Xinhua/Yang Guanyu)

A man visits a ceramics exhibition in New Taipei City, southeast China's Taiwan, Oct. 5, 2019. (Xinhua/Chen Bin)

Tourists visit an alley of Xinye ancient village in Jiande City, east China's Zhejiang Province, Oct. 5, 2019. (Xinhua/Xu Yu)

A visitor views a masterpiece of Dutch artist Rembrandt Harmenszoon Van Rijn in the Royal Castle in Warsaw, Poland, Oct. 5, 2019. (Photo by Jaap Arriens/Xinhua)

People take photos of pigeons on Red Square during the "Golden Autumn" festival in Moscow, Russia, Oct. 5, 2019. (Photo by Maxim Chernavsky/Xinhua)

People take a ride at a waterpark in Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, Oct. 5, 2019. (Xinhua/Ding Lei)