Title: Yu qing nian peng you tan zhi xue
Description: Ben shu shou you " wo zen yang xue xi xie zuo de ", " tan zhi xue de fang fa ", " tan zi xue gu wen zi ", " zhi xue suo yan " deng guan yu zhi xue de wen zhang.
Subjects: Zhi xue fang fa, Wen ji .