Women make the natural shampoo of fermented rice water in Huangluo Village of the Yao ethnic group in Longji Township of Longsheng County, south China's Guangxi Zhuang Autonomous Region, July 4, 2019. Women here have the tradition of keeping long hair. They use fermented rice water- the water after rinsing rice- together with natural ingredients such as tea seeds and orange peels to wash their hair. The natural shampoo keeps their hair healthy, smooth and shiny. (Photo by Liu Jiaoqing/Xinhua)

A woman pours the natural shampoo of fermented rice water into the tub in Huangluo Village of the Yao ethnic group in Longji Township of Longsheng County, south China's Guangxi Zhuang Autonomous Region, July 4, 2019. Women here have the tradition of keeping long hair. They use fermented rice water- the water after rinsing rice- together with natural ingredients such as tea seeds and orange peels to wash their hair. The natural shampoo keeps their hair healthy, smooth and shiny. (Photo by Huang Yongdan/Xinhua)

Women wash their long hair along the riverside in Huangluo Village of the Yao ethnic group in Longji Township of Longsheng County, south China's Guangxi Zhuang Autonomous Region, July 4, 2019. Women here have the tradition of keeping long hair. They use fermented rice water- the water after rinsing rice- together with natural ingredients such as tea seeds and orange peels to wash their hair. The natural shampoo keeps their hair healthy, smooth and shiny. (Photo by Liu Jiaoqing/Xinhua)

Women wash their long hair along the riverside in Huangluo Village of the Yao ethnic group in Longji Township of Longsheng County, south China's Guangxi Zhuang Autonomous Region, July 4, 2019. Women here have the tradition of keeping long hair. They use fermented rice water- the water after rinsing rice- together with natural ingredients such as tea seeds and orange peels to wash their hair. The natural shampoo keeps their hair healthy, smooth and shiny. (Photo by Liu Jiaoqing/Xinhua)

Women wash their long hair along the riverside in Huangluo Village of the Yao ethnic group in Longji Township of Longsheng County, south China's Guangxi Zhuang Autonomous Region, July 4, 2019. Women here have the tradition of keeping long hair. They use fermented rice water- the water after rinsing rice- together with natural ingredients such as tea seeds and orange peels to wash their hair. The natural shampoo keeps their hair healthy, smooth and shiny. (Photo by Liu Jiaoqing/Xinhua)