A map of the Chaobai River watershed in northeastern China, the 2nd "Jizhou Map" (<i>Jizhou 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. Shows Jizhou (now a district of Tianjin), Beijing and its environs, and the important Gubeikou Pass. The Great Wall is left undepicted. Each square is 40×40 li (about 12×12 km or 8×8 mi).
Zhu Siben, redrafted and updated by Luo Hongxian
1558
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