Gentlemen never act casually and only take action for justic. The gentleman must think twice before act: will this move hurt others?

君子不虚行，行必有正：如果是一个君子，他的一言一行，都不会随便，凡事他都会经过再三的考虑：这个行为会伤害到他人吗？

The third chapter is the emphasis. The chapter analyzes the ralations among justic act, real right change and real right On The Pablic Dispay.

第三章是本文的重点章，分析了物权行为、物权变动和公示效力之间的关系。