What doors does Zhouyi include?

The Zhouyi, which is popular now, consists of two parts. The first part is called the Book of Changes, that is, the Book of Changes itself, including sixty-four hexagrams, hexagrams, hexagrams names, hexagrams words, hexagrams names and hexagrams words. The second part is called Yi Zhuan, which includes ten articles on seven themes, namely Fu, Xiang, Cohesion, Classical Chinese, Divination, Preface and Miscellaneous Gua.