Tourists visit the Chongqing Garden during Beijing International Horticultural Exhibition in Beijing, capital of China, June 13, 2019. (Photos: Xinhua/Ren Chao)

Tourists visit the Chongqing Garden during Beijing International Horticultural Exhibition in Beijing, capital of China, June 13, 2019.

Tourists are seen at the entrance of the Chongqing Garden during Beijing International Horticultural Exhibition in Beijing, capital of China, June 13, 2019.

Tourists visit the Hainan Garden during Beijing International Horticultural Exhibition in Beijing, capital of China, June 13, 2019.

Tourists visit the Hainan Garden during Beijing International Horticultural Exhibition in Beijing, capital of China, June 13, 2019.

Tourists visit the Hainan Garden during Beijing International Horticultural Exhibition in Beijing, capital of China, June 13, 2019.