A map of the Luan River watershed in northeastern China, the 1st "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. Despite being named for Jizhou, now a district of Tianjin, the map does not include it but instead shows the area in Hebei to its northeast including the important Xifeng Pass (<i>Xifengkou</i>). The Great Wall is omitted from the area. 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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