Pirated books contain high levels of heavy metals, and exposure to high concentrations of lead will damage the brain and central nervous system, leading to coma, convulsions and even death. Children who recover from this poisoning often have mental disorders and behavioral disorders, even if they do not cause obvious symptoms, they will also cause a series of injuries to multiple systems of the body.

Lead will especially affect children's brain development, leading to behavioral changes such as decreased IQ, shortened attention time, decreased academic performance and increased antisocial behavior, and this effect is irreversible. For adults, the risk of kidney disease and hypertension will increase.

Identification of pirated books;

Look at the cover: Compared with the original books, the covers of pirated books are often not correct in color, or dull and listless, or gorgeous and enchanting, and the colors are often mixed together. As long as they are often compared, it is not difficult to tell the difference between them.

According to the book publishing standards, except dictionaries, the standard paper for books is above 52 grams, and the lead content of ink is also lower than people can bear. Printing quality can also make reading comfortable and protect readers' eyesight.

Look at the pricing: because pirated books are from paper, typesetting to printing, the cost is very low, and they don't pay the remuneration and evade taxes. Therefore, the seller is often two or three times lower than the marked price, and he will sell you a book marked 60 yuan at the price of 15 yuan. Most of the new books sold at half price on the stalls are pirated books.