Title: 21 shi ji gan bu ke ji xiu yang bi bei
Description: Ben shu bao kuo:shi ji zhi jiao de xing shi he tiao zhan, Tui dong jing ji she hui fa zhan de ji shu jin bu, You guan guo jia he di qu fa zhan ke ji de shi jian, Ke jiao xing guo zhan lüe yu ke chi xu fa zhan zhan lüe deng nei rong.
Subjects: Gan bu jiao yu, Ke xue zhi shi, Zi xue can kao zi liao ., Ke xue zhi shi .