My ex-boyfriend swiped my credit card for 4,000 yuan and refused to pay it back. He said he wanted to withdraw cash for me, but he kept defaulting on the payment and blocked me. Can I report it to him and give him a warning?

Yes! Steal other people's credit cards! Anyone who steals a credit card and uses it shall be convicted and punished in accordance with the provisions of Article 264 of this Law. Article 264: Whoever steals public or private property in a relatively large amount, or commits multiple thefts, burglaries, thefts with weapons, or pickpocketing shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention, or public surveillance, and shall also or solely be fined ; If the amount is huge or there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years, and shall also be fined; If the amount is particularly huge or there are other particularly serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than ten years or life imprisonment, and shall also be fined or confiscation property.