Stationery stores. Zi Zhi District writing books belong to the category of books of stationery, and the brand is popularized in all major stationery stores, and users can buy them in any of the stationery stores in their local area. Word Zhi District is a trademark that was applied for registration on June 22, 2017 by Beijing Yunshui Dining International Restaurant Management Co. It is a brand of calligraphy. A writing book is a book used for writing.