Photo taken on May 2, 2021 shows a cactus growing at the Shanghai Songjiang modern agriculture park in east China's Shanghai. (Photos: Xinhua)

Photo taken on May 2, 2021 shows cacti growing at the Shanghai Songjiang modern agriculture park in east China's Shanghai.

Photo taken on May 2, 2021 shows cacti growing at the Shanghai Songjiang modern agriculture park in east China's Shanghai.

Photo taken on May 2, 2021 shows a cactus growing at the Shanghai Songjiang modern agriculture park in east China's Shanghai.

Photo taken on May 2, 2021 shows cacti growing at the Shanghai Songjiang modern agriculture park in east China's Shanghai.

Photo taken on May 2, 2021 shows cacti growing at the Shanghai Songjiang modern agriculture park in east China's Shanghai.