Tourists pick apricots in Zouping County of Binzhou City, east China's Shandong Province, May 31, 2018. (Xinhua/Dong Naide)

Aerial photo shows the scenery of a holiday resort in Binzhou City, east China's Shandong Province, May 30, 2018. (Xinhua/Dong Naide)

Workers check the wheat at a farm in Zouping County of Binzhou City, east China's Shandong Province, May 31, 2018. (Xinhua/Dong Naide)

A staff member prunes a flower bush in Zouping County of Binzhou City, east China's Shandong Province, June 1, 2018. (Xinhua/Dong Naide)

Aerial photo shows tourists viewing the scenery on boats in the Xiaokaihe wetland in Bincheng District of Binzhou City, east China's Shandong Province, May 30, 2018. (Xinhua/Dong Naide)

Aerial photo shows fishing pounds in Qiaozhuang Town of Binzhou City, east China's Shandong Province, May 30, 2018. (Xinhua/Dong Naide)