All books after September 25th, 2009 must enter isbn number.

If there is no isbn number in Taobao database, books cannot be uploaded, and the uploaded book system will be automatically removed.

The following is the Want Want notice issued by Taobao Xiaoer:

In order to better protect intellectual property rights, crack down on infringement and keep books clean and tidy. During the period from September 16 to September 25th, 2009, it is hoped that all booksellers will cooperate to bind all book products under the store into regular isbn coded products. After September 25th, isbn coded products will become the only required attribute of all books, and we will take off the products without isbn coded products.