A woman of the Yao ethnic group takes out boiled Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, at Xinzhai Village in Longsheng, south China's Guangxi Zhuang Autonomous Region, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/Huang Yongdan)

Students taste Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, at an experimental middle school in Yuqing County of Zunyi, southwest China's Guizhou Province, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/He Chunyu)

Volunteers make Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, as festival gifts for the aged and sanitation workers in Xianju County of Taizhou, east China's Zhejiang Province, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/Wang Huabin)

Children learn to make Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, under teachers' guidance at Shibanqiao Primary School in Qianxi County of Bijie City, southwest China's Guizhou Province, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/Zhou Xunchao)

Women of the Yao ethnic group make Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, at Xinzhai Village in Longsheng, south China's Guangxi Zhuang Autonomous Region, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/Huang Yongdan)

Children learn to make Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, under teachers' guidance at a kindergarten in Jiande City, east China's Zhejiang Province, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/Ning Wenwu)

Children learn to make Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, under guidance of teachers and parents at a kindergarten in Jiande City, east China's Zhejiang Province, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/Ning Wenwu)

Children learn to make Zongzi, a traditional Chinese food made of glutinous rice wrapped in bamboo leaves, at Huaying Experimental Kindergarten in Huaying City, southwest China's Sichuan Province, June 5, 2019. People across the country make various kinds of Zongzi to celebrate the upcoming Dragon Boat Festival, which falls on June 7 this year. (Xinhua/Qiu Haiying)