1, summer physical book paper. Pirated books are made of inferior paper. Bleached paper containing a lot of fluorescent agent will penetrate to the other side. Usually one side will penetrate to the other side, and the genuine product has no fluorescent agent.

2. The printing quality of physical books in midsummer. The poor printing quality of pirated books will directly lead to the deviation of color expression, and the internal characters are prone to repetition and ambiguity, while the genuine ones will have bright colors. In this way, the inaccurate printing of books will affect our eyesight and the accuracy of children's literacy. "Summer" Author: Angelababy, End+ Fan Wai, Short Comment: Modern Sweet Text.