Aerial photo shows aquaculture floats at a sea farm in Rongcheng, east China's Shandong Province, July 26, 2020. Eco-friendly floats are widely used in the local aquaculture industry. (Photo by Li Xinjun/Xinhua)

Aerial photo shows aquaculture floats at a sea farm in Rongcheng, east China's Shandong Province, July 26, 2020. Eco-friendly floats are widely used in the local aquaculture industry. (Photo by Li Xinjun/Xinhua)

Aerial photo shows aquaculture floats at a sea farm in Rongcheng, east China's Shandong Province, July 26, 2020. Eco-friendly floats are widely used in the local aquaculture industry. (Photo by Li Xinjun/Xinhua)

Aerial photo shows aquaculture floats at a sea farm in Rongcheng, east China's Shandong Province, July 26, 2020. Eco-friendly floats are widely used in the local aquaculture industry. (Photo by Li Xinjun/Xinhua)