Dong Julan, a 60-year-old woman of Bai ethnic group, unties the knots of tie-dyeing cloth at Zhoucheng village of Bai autonomous prefecture of Dali, Southwest China's Yunnan province, May 25, 2017. As a traditional folk technique of the Bai ethnic group, tie dyeing was listed in 2006 into state-level intangible cultural heritages. The technique goes through three major steps: making knots, dipping and dyeing, and drying in the sun. Traditional tie-dyeing products are mostly inspired by local scenery and based on blue and white colors. [Photo/Xinhua]