Photo taken on May 16, 2020 shows a morning scenery of Tianlong Mountain in Chetian Township of Youyang Tujia and Miao Autonomous County, southwest China's Chongqing Municipality. (Photo by Huang Wei/Xinhua)

Photo taken on May 16, 2020 shows a morning scenery of Tianlong Mountain in Chetian Township of Youyang Tujia and Miao Autonomous County, southwest China's Chongqing Municipality. (Xinhua/Wang Quanchao)

Photo taken with a reverse graduated neutral density filter on May 16, 2020 shows a morning scenery of Tianlong Mountain in Chetian Township of Youyang Tujia and Miao Autonomous County, southwest China's Chongqing Municipality. (Photo by Huang Wei/Xinhua)

Photo taken on May 16, 2020 shows a morning scenery of Tianlong Mountain in Chetian Township of Youyang Tujia and Miao Autonomous County, southwest China's Chongqing Municipality. (Xinhua/Wang Quanchao)

Photo taken on May 16, 2020 shows a morning scenery of Tianlong Mountain in Chetian Township of Youyang Tujia and Miao Autonomous County, southwest China's Chongqing Municipality. (Photo by Huang Wei/Xinhua)