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Photo taken on June 24, 2018 shows the Yellow River estuary in Dongying, east China's Shandong Province. The Yellow River, the second longest river in China, originates on the Qinghai-Tibet Plateau and empties into the Bohai Sea from Dongying City. The city has been making efforts to promote ecological civilization and accelerate the construction of "wetland city". (Xinhua/Zhu Zheng)