| Rare birds such as white swans and bar-headed geese swim in the Yellow River Estuary Eco-tourist zone in Dongying city, Shandong province. The city is promoting the construction of ecological tourism and introducing rare birds such as white swans, black swans, wild ducks, mandarin ducks and wild geese into the environment. At present, over 10,000 rare birds have settled in the Yellow River Estuary Eco-tourist zone. |
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