The paper can be summarised as follows.
1. The description of the three kinds of cessation and contemplation meditation in the Mohe zhiguan 摩訶止観 does not always accurately reflect Zhiyi’s 智顗 intention. Its content has been heavily modified by Guanding 灌頂. It can be assumed that his understanding of the three kinds of cessation and contemplation meditation was not constant.
2. The Liumiaomen 六妙門 （Six Subtle Dharma Gates） corresponds to the indefinite 不定 among the three kinds of cessation and contemplation meditation in the preface to the Mohe zhiguan. However, it is difficult to believe that this too is in line with Zhiyi’s intention. This is because there is no commentary in the Liumiaomen or other works on the six subtle gates that states that it corresponds to indefiniteness.
3. It is difficult to believe that the Liumiaomen was initially preached to show the indefinite in the three kinds of cessation and contemplation meditation. If one looks back after the completion of the cessation and contemplation meditation in the later years of Zhiyi’s life, it is possible to regard the Liumiaomen as a work in which indefiniteness was taught. However, there is no mention of an emphasis on indefiniteness in the Liumiaomen. Furthermore, there is no uniqueness in the Liumiaomen when compared to the lectures on indefiniteness in the Liumiaomen and other works.
