People take wedding photos on the bank of the Lancang River in Jinghong, Southwest China's Yunnan province, Nov 29, 2018. [Photo/Xinhua]

Aerial photo taken on March 17, 2019 shows scenery of the bend of Jinsha River at Shigu village, Yulong Naxi autonomous county in Lijiang, Southwest China's Yunnan province. The Jinsha River is the upper reaches of the Yangtze River, China's longest river. [Photo/Xinhua]

Aerial photo taken on April 18, 2019 shows the scenery of the Dulong River Gorge in Southwest China's Yunnan province. [Photo/Xinhua]

Aerial photo taken on April 21, 2019 shows the scenery of the Blue Moon Valley scenic spot in Lijiang, Southwest China's Yunnan province. [Photo/Xinhua]

Photo taken on April 24, 2019 shows the blooming jacaranda on street in Kunming, southwest China's Yunnan Province. [Photo/Xinhua]

Aerial photo taken on April 4, 2019 shows the sunrise scenery of the Hani terraced fields in Yuanyang county, Southwest China's Yunnan province. [Photo/Xinhua]

Aerial photo taken on Jan 5, 2019 shows the scenery of the Waterfall Park in Kunming, Southwest China's Yunnan province. [Photo/Xinhua]

Aerial photo taken on June 8, 2019 shows the scenery of water basins on Laojun Mountain in Lijiang, Southwest China's Yunnan province. [Photo/Xinhua]

Aerial photo taken on Dec 16, 2017 shows the sunset scenery of the cherry valley on Wuliang Mountain in Nanjian Yi autonomous county, Southwest China's Yunnan province. [Photo/Xinhua]

Aerial photo taken on July 5, 2018 shows the scenery of Erhai Lake in Dali, Southwest China's Yunnan province. [Photo/Xinhua]

People interact with black-headed gulls on the bank of Dianchi Lake in Kunming, Southwest China's Yunnan province, March 15, 2016. [Photo/Xinhua]

Aerial photo taken on March 28, 2017 shows the scenery of the Meili Snow Mountains in Southwest China's Yunnan province. [Photo/Xinhua]

Aerial photo taken on April 2, 2019 shows the rural scenery in Tonghai county of Yuxi, Southwest China's Yunnan province. [Photo/Xinhua]