People watch a performance of Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Li Mengxin)

People perform Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Shi Youdong)

People perform Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Shi Youdong)

People perform Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Li Mengxin)

A woman performs Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Ma Ning)

A man performs Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Chen Junqing)

A man performs Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Ma Ning)

A man participates in an event of Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Zhang Fan)

A man performs Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Chen Junqing)

People watch a performance of Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Shi Youdong)

A man performs Hua'er, a folk song popular in northwest China, at Songmingyan scenic area in Hezheng County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province, June 1, 2019. An event of Hua'er performance kicked off here on Saturday. Hua'er, literally "the flower", is a folk song popular in the country's northwest. It was listed as a UNESCO Intangible Cultural Heritage in 2009. (Xinhua/Chen Junqing)