The Chinese white dolphins are spotted in Baibu Bay, South China's Guangxi Zhuang Autonomous Region, in late May, 2016. The endangered species, rarely seen in coastal areas, can now be seen in the bay following intensified efforts to protect the environment. Photo: China News Service

The Chinese white dolphins are spotted in Baibu Bay, South China's Guangxi Zhuang Autonomous Region, in late May, 2016. The endangered species, rarely seen in coastal areas, can now be seen in the bay following intensified efforts to protect the environment. Photo: China News Service

The Chinese white dolphins are spotted in Baibu Bay, South China's Guangxi Zhuang Autonomous Region, in late May, 2016. The endangered species, rarely seen in coastal areas, can now be seen in the bay following intensified efforts to protect the environment. Photo: China News Service

The Chinese white dolphins are spotted in Baibu Bay, South China's Guangxi Zhuang Autonomous Region, in late May, 2016. The endangered species, rarely seen in coastal areas, can now be seen in the bay following intensified efforts to protect the environment. Photo: China News Service

The Chinese white dolphins are spotted in Baibu Bay, South China's Guangxi Zhuang Autonomous Region, in late May, 2016. The endangered species, rarely seen in coastal areas, can now be seen in the bay following intensified efforts to protect the environment. Photo: China News Service

The Chinese white dolphins are spotted in Baibu Bay, South China's Guangxi Zhuang Autonomous Region, in late May, 2016. The endangered species, rarely seen in coastal areas, can now be seen in the bay following intensified efforts to protect the environment. Photo: China News Service