Photo taken on Sept 7, 2018 shows the sky with cloud in the morning above Yiyun Lake in Shanting district in Zaozhuang city, East China's Shandong province. [Photo/Xinhua]

A father and his daughter play in sunset on the seashore in Yantai, East China's Shandong province, Sept 5, 2018. [Photo/Xinhua]

Photo taken on Sept 5, 2018 shows clouds in sunset in Yantai, East China's Shandong province. [Photo/Xinhua]