How many names of ZhengYangmen are called since the Yuan dynasty?

正阳门从元朝开始共经历了几个名字？

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Waiter: This is the Peking Duck. It's a famous Beijing dish that has been around since the Yuan Dynasty.

服务员：这是北京烤鸭。这道著名的北京莱从元朝的时候就有了。

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Since the Yuan Dynasty since its scenery at all during the eight wonders of Guangzhou occupies an important position.

自元代以来，其风景在各时期的羊城八景中占有重要的位置。

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Within a few minutes' walk of Meyer's home is Liulichang, Beijing's 750-meter (half-mile) antiques street which has flourished since the Yuan dynasty 800 years ago.

CNN: Beijing's past faces its future