Wikipedia:
Yu Qin
Yu Qin (于钦, 1284 A.D - 1333 A.D) was a well-known Chinese geographer living in the Yuan Dynasty. In 1319 A.D, he was appointed the official of Jinan to resolve the starvation problem caused by bad harvesting. He started to write the famous geography book Qi Cheng (齐乘) during this period, which was the oldest known geography book about Shandong Province.
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