Li Lai in Shuang Shan, Yulin, Shaanxi.

The origin of Shuang Shan in Yulin, Shaanxi Province is:

Shuang Shan 1 in Yulin, Shaanxi Province was built by Ming Chenghua on 1 1 (1475) in Shuangshan Village, Shuang Shan Township, 70 miles northeast of Yulin County. The city is an irregular rectangle, and the foundation of the city is shoveled because of the mountains.

2. Shuang Shan Fort is located in Shuangshanbao Village, Mahuangliang Town, Yuyang District, 70 miles east of Yulin County. It is one of the 36 camps along the Great Wall in Yansui Town in Ming Dynasty, which belongs to the camp under the jurisdiction of Yulin Road.