Brother, it's just HF, H2O2, dilute nitric acid and dilute sulfuric acid, but if you don't care about your love card, it's gone. Dude, come on. You think the card is made of active chemical elements, and it has long been broken. Everything in life has electricity, acid and everything, so it reacts so early. The magnetic stripe is made of inert elements and radioactive, brother. Cobalt is a radioactive element commonly used in medicine. It's best to take one ICBC card, one Zhang Jianshe card, one postal card and three cards with you. It's best not to use a credit card or withdraw cash. Not a good deal, man. You got it?