The purpose of this study is to discuss the issue related the ancient Chinese personal cultivation-”shen du” (慎獨). This paper discusses the conception of ”shen du” in the documents appearing in an excavation unearthed besides inheritable ancient classics. As space is limited, I will concentrate on the development of ”shen du” (慎獨). The effect of ”shen du” in different thinker or classics is too complicated to be examined in detail here. I will concentrate on the following issues: the development of the conception ”shen du” and the correct explanation of the conception ”shen du” in Chu Bamboo Manuscripts of Guodian. We are not concerned with the documents of Sung dynasty because it is another system.