According to the book publishing experience of Cai Sheng culture in Chengdu for many years, there are three publishing numbers (ISBN). The cheapest is the book number of Hong Kong and Taiwan Province, and you can get it for only a few hundred dollars. However, these books need to go through an import and export trading company in Chinese mainland before they can go on sale, otherwise they are not allowed to go on sale. The second is the serial number. At present, many publishing houses are not allowed to publish series, requiring a book number. However, some publishers, considering the author's own economic situation and other specific circumstances, agreed to publish in the form of a series. This serial number is relatively cheaper, about 5,000 yuan, but the publishing house requires that the book cannot be priced in volumes. The third is the single book number. According to different publishers, the ISBN fee is high or low, generally between 12000- 18000. Some clubs also charge editing fees according to the number of words, and the charging standard is 60 yuan-150 yuan per 10,000 words.