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The Long Wall of Quang Ngai , Truong luy, or the Great Wall of Vietnam is a 127.4-kilometre rampart extending from Vietnam's Quảng Ngãi Province in the north to Binh Dinh Province in the south. The defensive wall was built by the Nguyen Dynasty as a demarcation line against the Đá Vách. It is the longest monument in Southeast Asia.
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