Women of Dai ethnic group show traditional paper-making craft, using a kind of bark as raw material, at Mengtuan Village in Lincang City, Southwest China's Yunnan Province, Oct. 15, 2018. The paper-making technique dated from 600 years ago and was listed as a national intangible cultural heritage in 2006. (Photo: China News Service/Miao Chao)

Women of Dai ethnic group show traditional paper-making craft, using a kind of bark as raw material, at Mengtuan Village in Lincang City, Southwest China's Yunnan Province, Oct. 15, 2018. The paper-making technique dated from 600 years ago and was listed as a national intangible cultural heritage in 2006. (Photo: China News Service/Miao Chao)

Women of Dai ethnic group show traditional handicrafts at Mengtuan Village in Lincang City, Southwest China's Yunnan Province, Oct. 15, 2018. (Photo: China News Service/Miao Chao)

Women of Dai ethnic group show traditional paper-making craft, using a kind of bark as raw material, at Mengtuan Village in Lincang City, Southwest China's Yunnan Province, Oct. 15, 2018. The paper-making technique dated from 600 years ago and was listed as a national intangible cultural heritage in 2006. (Photo: China News Service/Miao Chao)

Women of Dai ethnic group show traditional paper-making craft, using a kind of bark as raw material, at Mengtuan Village in Lincang City, Southwest China's Yunnan Province, Oct. 15, 2018. The paper-making technique dated from 600 years ago and was listed as a national intangible cultural heritage in 2006. (Photo: China News Service/Miao Chao)