Aerial photo taken on Oct. 2, 2021 shows tourists rafting at the Great Nanjiang Canyon in Kaiyang County, southwest China's Guizhou Province. Saturday was the second day of China's week-long National Day holiday. (Photo by Hu Panxue/Xinhua)

Tourists experience paragliding in Tonglu County, east China's Zhejiang Province, Oct. 2, 2021. Saturday was the second day of China's week-long National Day holiday. (Xinhua/Huang Zongzhi)

Tourists enjoy themselves on a glass-bottomed slide at the Great Nanjiang Canyon in Kaiyang County, southwest China's Guizhou Province, Oct. 2, 2021. Saturday was the second day of China's week-long National Day holiday. (Photo by Fan Hui/Xinhua)

Tourists visit Yuyuan Garden in Shanghai, east China, Oct. 2, 2021. Saturday was the second day of China's week-long National Day holiday. (Xinhua/Wang Xiang)

Tourists visit the Emperor Qinshihuang's Mausoleum Site Museum in Xi'an, capital of northwest China's Shaanxi Province, Oct. 2, 2021. Saturday was the second day of China's week-long National Day holiday. (Xinhua/Liu Xiao)

Aerial photo taken on Oct. 2, 2021 shows tourists enjoying themselves at a water park in Changsha, capital of central China's Hunan Province. Saturday was the second day of China's week-long National Day holiday. (Xinhua/Chen Zhenhai)

Tourists enjoy themselves on a glass-bottomed bridge at the Great Nanjiang Canyon in Kaiyang County, southwest China's Guizhou Province, Oct. 2, 2021. Saturday was the second day of China's week-long National Day holiday. (Photo by Liang Huafu/Xinhua)

Children learn to perform a traditional Chinese tea ceremony at Hangzhou Youth & Children Development Center on the third day of China's National Day holiday in Hangzhou, east China's Zhejiang Province, Oct. 3, 2021. (Xinhua/Huang Zongzhi)

A girl learns Chinese calligraphy at Hangzhou Youth & Children Development Center on the third day of China's National Day holiday in Hangzhou, east China's Zhejiang Province, Oct. 3, 2021. (Xinhua/Huang Zongzhi)