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Zhang Heng,also named Ping Zi,was born in Shiqiao Town,Xi'e, Nanyang Province,which is Nanyang,Henan Province today,in the 3rd year of Jianchu, Donghan Dynasty.It is he that is a great scientist dating back to ancient China 1800 years ago,the key man of astronomy,and the first man who studies earthquakes.Chinese people rebuilt the Pingzi Reading Place and his tomb in 1956 in horour of him.Later in 1977,a little planet in the sun systerm numbered 1082 was named Zhang Heng Star in order to remind people of his significant contributions for human.

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