This paper is one of a series of my articles researching practice ways of "Perfect-teaching" (圓教) in T'ien-t'ai Buddhism. Practicing different ways of Perfect-teaching is the most unsurpassable and wonderful one among all dharma-gates. However, it has been an issue of debate among the academia whether these are suitable for average people to practice or not. Moreover, I realize that in fact, there are several ways to practice Perfect-teaching showing different characteristics. As a result, they have their different positions, are suitable for different people, and can reach different obtainments.In order to fully comprehend the related issues in ways of practice in Perfect-teaching, it is imperative to fully clarify aspects that are not well defined in academia. For example, different ways of practice, possibilities in classification of different ways, and justifications of different ways in Perfect-teaching should all be studied. Main objectives of this research are as follows: all ways of practice in Perfect-teaching will be collected, reasons of different ways of practice as such will be analyzed and classified, and then foundations of various ways in practicing Perfect-teaching will be concluded. Only after these works have been done can one gain a correct whole picture of the practices in Perfect-teaching which is the foundation to sort out different viewpoints of the Perfect-teaching.After analyzing thirty ways of practice in Perfect-teaching taught by Master Zhi-yi (智顗), seven characteristics or circumstances can be identified that make a certain practice under the Perfect-teaching:a. when recitation of the "Saddharmapundarika Sutra" (妙法蓮華經) is involved or it has been stated clearly in the scripture;b. when it belongs to the unsurpassed Buddha of Perfect-teaching;c. when it corresponds to the principles of the Perfect-teaching;d. when it is defined by the principle of Perfect-teaching;e. practices which are unique to the Perfect-teaching;f. those that are the prerequisites of "Threefold Contemplation in One Single Mind" (一心三觀,) which is the representative way of practice in Perfect-teaching; andg. those that are auxiliary to the "Threefold Contemplation in One Single Mind."
