The books in Muduo book franchise store are all genuine, only a little damaged, and the price is OK. There are genuine and pirated books in Pinduoduo. Generally, the price of genuine books will be more expensive, about 20 30 yuan per book, and you have to look at his publishing house, which is published by regular publishing houses. If it's Pinduoduo, up there? Books of 9.9 10 are generally pirated books, because genuine books are not so cheap, but there are still genuine books on sale in Pinduoduo.