当时元世祖忽必烈汗正统治着中国。

At that time, China was RULED BY THE Yuan Dynasty Emperor, Kublai Khan.

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元世祖率大军跨革囊及筏渡过金沙江，统一了云南。

Khan led his army to cross exposure and raft through the Jinsha River, unified Yunnan.

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第一，元世祖忽必烈在统一战争结束后，确曾下令拆毁南方城市的城墙，拆毁之后严禁重修。

First, Yuanshizhu Emperor Kublai Khan ended after the unification war, firmly once issued an order south demolishing the city city wall, after demolishing strictly prohibited repairing.

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