Aerial photo taken on March 26, 2020 shows tourists amid peony flowers at the scenic spot of Kaizhifeng in Dianjiang County of Chongqing Municipality, southwest China. (Xinhua/Liu Chan)

Tourists enjoy peony flowers at the scenic spot of Kaizhifeng in Dianjiang County of Chongqing Municipality, southwest China, March 26, 2020. (Xinhua/Liu Chan)

Tourists pose for a group photo in front of peony flowers at a peony garden in Dianjiang County of Chongqing Municipality, southwest China, March 26, 2020. (Xinhua/Liu Chan)

Photo taken on March 26, 2020 shows peony flowers at a peony garden in Dianjiang County of Chongqing Municipality, southwest China. (Xinhua/Liu Chan)

Aerial photo taken on March 26, 2020 shows tourists amid peony flowers at the scenic spot of Kaizhifeng in Dianjiang County of Chongqing Municipality, southwest China. (Xinhua/Liu Chan)