The "Map of Zhuanglang, Xining, Liangzhou, and Yongchang" (<i>Zhuang Ning Liang Yong Biantu</i>) from Luo Hongxian's <i>Enlarged Atlas</i>, Vol. 2, based on the maps first drafted by Zhu Siben. Library of Congress copy of Hu Song's 1558 revision. Depicts the Great Wall and the area of the current prefectures of Wuwei, Jinchang, and Zhangye in central Gansu and the area of the current prefectures of Haibei, Xining, and Haidong in northeastern Qinghai. Grid of 100×100 li (about 33×33 km or 20×20 mi).
Zhu Siben, redrafted and revised by Luo Hongxian, edited by Hu Song
1558
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