Aerial photo taken on May 13, 2020 shows flower fields at the San Tai Mountain Forest Park in Suqian City, east China's Jiangsu Province. (Xinhua/Ji Chunpeng)

Aerial photo taken on May 13, 2020 shows flower fields at the San Tai Mountain Forest Park in Suqian City, east China's Jiangsu Province. (Xinhua/Han Yuqing)

Aerial photo taken on May 13, 2020 shows flower fields at the San Tai Mountain Forest Park in Suqian City, east China's Jiangsu Province. (Xinhua/Li Bo)

Aerial photo taken on May 13, 2020 shows flower fields at the San Tai Mountain Forest Park in Suqian City, east China's Jiangsu Province. (Xinhua/Ji Chunpeng)

Aerial photo taken on May 13, 2020 shows flower fields at the San Tai Mountain Forest Park in Suqian City, east China's Jiangsu Province. (Xinhua/Li Bo)

Aerial photo taken on May 13, 2020 shows flower fields at the San Tai Mountain Forest Park in Suqian City, east China's Jiangsu Province. (Xinhua/Li Bo)