Photocopy, scan and identify the original book and rearrange it. The special photocopy is to copy the original book as a whole, and the size and spacing of words are exactly the same as the original book. Of course, there will be no typos. The only deficiency is the quality of paper and printing, but it definitely does not affect reading.

The principle of pirated books is to scan the original book, and then use the relevant character recognition system to restore the scanned characters into images one by one. Due to the problem of algorithm, there will naturally be some word recognition errors, which will lead to typos. As a pirated product, it pursues to seize the market of genuine books in a short time. The illegal publishing house directly downloads the Chinese characters recognized by the image to the printing house, and what you have in your hand is. Pirated books are called.