Photo taken on May 25, 2017 shows steamed Zongzi, a pyramid-shaped dumpling made of glutinous rice wrapped in bamboo or reed leaves, in Songyang County, east China's Zhejiang Province. The Dragon Boat Festival of this year will fall on May 30. (Xinhua/Zhang Cheng)

Photo taken on May 25, 2017 shows Zongzi, a pyramid-shaped dumpling made of glutinous rice wrapped in bamboo or reed leaves, in Songyang County, east China's Zhejiang Province. The Dragon Boat Festival of this year will fall on May 30. (Xinhua/Zhang Cheng)

A household makes Zongzi, a pyramid-shaped dumpling made of glutinous rice wrapped in bamboo or reed leaves, in Songyang County, east China's Zhejiang Province, May 25, 2017. The Dragon Boat Festival of this year will fall on May 30. (Xinhua/Zhang Cheng)

A household makes Zongzi, a pyramid-shaped dumpling made of glutinous rice wrapped in bamboo or reed leaves, in Songyang County, east China's Zhejiang Province, May 25, 2017. The Dragon Boat Festival of this year will fall on May 30. (Xinhua/Zhang Cheng)

A household makes Zongzi, a pyramid-shaped dumpling made of glutinous rice wrapped in bamboo or reed leaves, in Songyang County, east China's Zhejiang Province, May 25, 2017. The Dragon Boat Festival of this year will fall on May 30. (Xinhua/Zhang Cheng)