Tourists visit a spice trade museum in "City of Flower", a flower-themed complex, in Kunming, capital of southwest China's Yunnan Province, Oct. 4, 2018. (Photos: Xinhua)

Tourists visit a greenhouse in "City of Flower", a flower-themed complex, in Kunming, capital of southwest China's Yunnan Province, Oct. 4, 2018.

A tourist poses for photos at a greenhouse in "City of Flower", a flower-themed complex, in Kunming, capital of southwest China's Yunnan Province, Oct. 4, 2018.

Tourists watch a 4D movie in "City of Flower", a flower-themed complex, in Kunming, capital of southwest China's Yunnan Province, Oct. 4, 2018.