shi gan xing 干性
In the world's oldest astronomical book "Gan Shi Xing Jing", the calendar established than in Europe as early as 160 years.
出现了世界上最早的天文著作《甘石星经》，历法的确立比欧洲早160年。
There have been the world's oldest astronomical works, "Gan Shi Xing Jing", the calendar established than in Europe as early as 160 years.
出现了世界上最早的天文著作《甘石星经》，历法的确立比欧洲早160年。
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