China Merchants Credit Card, Chip Card Why do McDonald's employees have to brush magnetic stripes, and they don't even need passwords and signatures? Why don't they just chip? It always feels magnetic. As for the POS machine, if it is a magnetic stripe card, the magnetic stripe must be brushed, but if it is a chip card, it must be inserted to brush the chip. First of all, you should pay attention to your card at present, and whether there will be unclear charges later. I am most afraid that his card is a bank card reader, and then let him know your password. It is impossible to brush a magnetic stripe on a chip card. I have been in this industry for several years, and I am still doing it. I have never encountered such a problem.