Aerial photo taken on April 25, 2020 shows a fisherman checking the growth of sea cucumber at a sea farm in Jimo District of Qingdao, east China's Shandong Province. The fishery industry in Jimo has resumed operation in an orderly manner. (Photo by Liang Xiaopeng/Xinhua)

Aerial photo taken on April 25, 2020 shows a fisherman checking the growth of sea cucumber at a sea farm in Jimo District of Qingdao, east China's Shandong Province. The fishery industry in Jimo has resumed operation in an orderly manner. (Photo by Liang Xiaopeng/Xinhua)

Aerial photo taken on April 25, 2020 shows a fisherman checking the growth of sea cucumber at a sea farm in Jimo District of Qingdao, east China's Shandong Province. The fishery industry in Jimo has resumed operation in an orderly manner. (Photo by Liang Xiaopeng/Xinhua)

Aerial photo taken on April 25, 2020 shows a fisherman checking the growth of sea cucumber at a sea farm in Jimo District of Qingdao, east China's Shandong Province. The fishery industry in Jimo has resumed operation in an orderly manner. (Photo by Liang Xiaopeng/Xinhua)