by Wang wen hua, Xu wen li
Ben shu gong fen shi er zhang nei rong bao kuo:zong lun,Huo bi zi jin de he suan,Ying shou he yu fu kuan xiang de he suan,Cun huo de he suan,Tou zi de he suan,Gu ding zi chan de he suan,Wu xing zi…