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Visitors pose for photos at Caka Salt Lake in Wulan County, northwest China's Qinghai Province, Sept. 23, 2020. The province saw over 32 million tourist arrivals and its tourist revenue totaled more than 28 billion yuan (about 4.3 billion U.S. dollars) from January to November in 2020. (Xinhua/Zhang Long)

Visitors have fun by the Qinghai Lake in northwest China's Qinghai Province, Sept. 23, 2020. The province saw over 32 million tourist arrivals and its tourist revenue totaled more than 28 billion yuan (about 4.3 billion U.S. dollars) from January to November in 2020. (Xinhua/Zhang Long)

Aerial photo taken on June 15, 2020 shows a view of Danxia landform, a landscape characterized by reddish sandstone features, in Guide County, northwest China's Qinghai Province. The province saw over 32 million tourist arrivals and its tourist revenue totaled more than 28 billion yuan (about 4.3 billion U.S. dollars) from January to November in 2020. (Xinhua/Wu Gang)

A visitor poses for photos by the Qinghai Lake in northwest China's Qinghai Province, Sept. 23, 2020. The province saw over 32 million tourist arrivals and its tourist revenue totaled more than 28 billion yuan (about 4.3 billion U.S. dollars) from January to November in 2020. (Xinhua/Zhang Long)

Tourists take photos amid cole flowers in Menyuan Hui Autonomous County, northwest China's Qinghai Province, July 22, 2020 . The province saw over 32 million tourist arrivals and its tourist revenue totaled more than 28 billion yuan (about 4.3 billion U.S. dollars) from January to November in 2020. (Xinhua/Wu Gang)

Aerial photo taken on July 28, 2020 shows the sand dune by the Qinghai Lake in northwest China's Qinghai Province. The province saw over 32 million tourist arrivals and its tourist revenue totaled more than 28 billion yuan (about 4.3 billion U.S. dollars) from January to November in 2020. (Xinhua/Wu Gang)