After we came out of the Zhang Qian Memorial Hall, we came to Wumenyan.

Wumenyan is located in the east of Orange Yuan Town, 15 kilometers north of Chenggu County, on the west bank of the Huangshui River, a tributary of the Han River, a tributary of the Yangtze River. Legend has it that it began in the period of Wang Mang of the New Han Dynasty and was built as a low-dam barrage irrigation project that was built by intercepting the river and has a history of more than 2,000 years. It is the only ancient water conservancy in Shaanxi that is the most intact and the oldest and still plays an irrigation role, and is known as "Dujiangyan in southern Shaanxi".

"Do you know why it's called Wumenyan?" I asked Ye Qian with a smile.

"I don't know," Ye Qian smiled, "Please speak!" ”

"The Wumen weir is composed of three parts: the weir mouth, the weir dam, and the weir canal," I explained solemnly

"If You Love Me, Please Be in Beijing" Chapter 472 At Wumenyan, the ancient soaphorn tree is being hit by hand, please wait a moment,

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