王船山 易學 周易內傳 周易內傳發例 乾坤並建 彖爻一致 四聖一揆 占學一理 Wang Chuan-shan Theory of Yi-Jing Interpretation of the I-Ching The principles setting in the inner commentary of Zhou YiI The co-establishment of the principles of qian and kun The establishment of the identity of tuan with yao The consistency of four Saints Learnings to be a gentleman by consulting the diagrams