Why can't I buy long and short scriptures on Taobao?

Maybe the book is sold out, or maybe there is no copyright.

Anti-Classics, also known as Long Classics and Short Classics, was written by Zhao Qi in Tang Dynasty. It means right and wrong, gain and loss, length, advantages and disadvantages. Ji Xiaolan's Summary of the Long and Short Classics of Sikuquanshu said: "This book analyzes the situation and its words are covered by strategists, hence the name' Chang'."

Abstract: Written by Tang. Sun Guangxian's "North Dream" contains: "Yan is from Yanting, Zizhou. Be knowledgeable and knowledgeable, and be longer than the world. Both husband and wife have hidden exercises and should not be summoned. " "Tang Shuyi Wen Zhi" also contains: "Yan, the word Taibin, is from Zizhou. Kaiyuan called it. " It's similar to Guangxian's subject. But the title is "Long and Short Skills". Cover, a book, two names. All the books are about the importance of Wang Bo's economic strength, which was completed in the fourth year of Kaiyuan. In order, all sixty-three articles are combined into ten volumes. Tang Zhi and Reading in Wu Gong have the same number of volumes. It hasn't been published for a long time.