dialogues on the Theory of Legal Acts Studies in the theory of speech acts Research on the theory of legal causation 民商法私塾：《法律行为论》读书会问答：dialogues on the Theory of Legal Acts Dialogues on the purpose of life Dialogues on the human ape Essay on the theory of the Earth Three essays on the theory of sexuality New essays on the theory of T.R. Malthu Confucian virtue theory of legal adjudication