Mysterious credit card cloning cases are happening one after another, and the current situation of citizens' credit cards is "full of crises". An informed person told the reporter that on the one hand, fraud criminal groups collude with employees of consumption units to take advantage of bank loopholes and复制credit cards at a low cost, and on the other hand, during unintentional consumption or "answering questions", important information such as "cvv" (last three digits) and "expiration date" may be unknowingly leaked.