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Why is Lanping County in Nujiang Prefecture of Yunnan called Lanping County?

it was thousands of years ago! Here is a piece of Wang Yang sea, and later, due to the crustal movement, there is no sea here! Therefore, it is rich in resources, without the interference of war, and people live a peaceful life, so it was called "Ping". Later, it was rich in orchids, so it was called "Lanping". In the end, it was changed to "Lanping"