Theory of Ji-se (thus form) of Zhi-dun as a kind of understanding to emptiness (śūnyatā), is still the theory of dependent origination and the emptiness of nature from Indian Mādhyamika school. This understanding should not be understand as wrong understanding to śūnyatā from of interpreting pattern sinolization of Buddhism. Theory of Ji-se embraces two aspects: one aspect is “form is empty thus it is completely not exist”. That is to say, Theory of Ji-se is a kind of Ben-wu (completely not exist), and it understand emptiness as completely not exist. Another aspect is “thus form to wander in darkness”which implies a kind of spiritual sphere of saint who can wander in absolute freedom as described in the Book of Chuang-tzu. Although this two aspects can’t be specified very detailed, still many contents can be found in Zhi-dun’s extant article named Preface to Extraction from Comparison between two Chinese translation of mahāprajñāparamitā-sūtra (Da-xiao-pin-dui-bi-yao-chao-xu).