Textual Research on the Four Schools of The Book of Songs was Putting in Official School Factions in Han Dynasty

Moshi was put in official school in Yuanshi five years of Emperor Ping,and that continue to end of Wangmang period.Lushi was put in official school after Emperor Wu put Wujing in official school.Qishi was put in official school factions is not later than Yuanfeng one year of Emperor Zhao.Hanshi possible was put in official school in Shiyuan five years of Emperor Zhao.It is wrong,The Scholars think that Sanjiashi were put in official School in times of Emperor Wen And Emperor Jing,or put in official school when Emperor Wu put Wujing in official school,and Moshi was put in official school in Yuanshi four years of Emperor Ping.In times of Emperor Wen And Emperor Jing,difficult factions not shape;Emperor Wu put Wujing in official school,it was clear about quality of adviser,that must be Scholar of Rujia,and that time,the think of difficult factions is not obvious.