Children paint among cole flower fields at an ecological scenic spot in Huzhou City, east China's Zhejiang Province, March 30, 2019. A cole flower tourism festival kicked off here on Saturday. (Xinhua/Xu Yu)

Aerial photo shows villagers performing dragon dance among cole flower fields at an ecological scenic spot in Huzhou City, east China's Zhejiang Province, March 30, 2019. A cole flower tourism festival kicked off here on Saturday. (Xinhua/Xu Yu)

Aerial photo shows villagers performing dragon dance among cole flower fields at an ecological scenic spot in Huzhou City, east China's Zhejiang Province, March 30, 2019. A cole flower tourism festival kicked off here on Saturday. (Xinhua/Xu Yu)

People visit cole flower fields at an ecological scenic spot in Huzhou City, east China's Zhejiang Province, March 30, 2019. A cole flower tourism festival kicked off here on Saturday. (Xinhua/Xu Yu)

People visit cole flower fields at an ecological scenic spot in Huzhou City, east China's Zhejiang Province, March 30, 2019. A cole flower tourism festival kicked off here on Saturday. (Xinhua/Xu Yu)