The following anti-theft practices in libraries are incorrect: no anti-theft facilities or electronic monitoring are installed. It is not safe without proper protective facilities. The anti-theft measures of the library are as follows:

1, acoustic and magnetic anti-theft technology, books are labeled with acoustic and magnetic anti-theft labels, and the cashier is equipped with an acoustic and magnetic decoder;

2. Acoustic and magnetic anti-theft antenna is installed at the door. When the customer fails to settle the bill and passes through the anti-theft antenna, the anti-theft antenna will alarm that the bill has not been settled, and the book can only be taken out after decoding;

3. Mark the book and put it in the locked bookcase;

4. Install electronic monitoring.