Aerial photo shows the Yellow River national nature reserve in east China's Shandong Province, Oct. 17, 2019. (Xinhua/Wang Kai)
Aerial photo shows the Yellow River national nature reserve in east China's Shandong Province, Oct. 17, 2019. (Xinhua/Wang Kai)
Aerial photo shows the Yellow River national nature reserve in east China's Shandong Province, Oct. 17, 2019. (Xinhua/Wang Kai)
Birds rest at the Yellow River national nature reserve in east China's Shandong Province, Oct. 17, 2019. (Xinhua/Wang Kai)