Zi Collection, Upper Volume, Page 3, Entry 02 According to the "Zi Hui" (Zihui), this character represents the ancient character for "heaven." The "Guang Yun" (Guangyun), "Ji Yun" (Jiyun), and "Yun Hui Xiao Bu" (Yunhuixiaobu) record that the ancient character for "heaven" was written as , and this character is likely a corruption of that character. The "Zheng Zi Tong" (Zhengzitong) states that this character is not an ancient form, which is an overstatement.