I want to ask my brother to go to a loan company for a loan. You need to sign as a guarantor, but you don't need to provide proof such as real estate license to sign. Is the potential risk great?
I suggest you look at the relevant laws and find out what a guarantor is and what their rights and obligations are. Understand the risks and responsibilities before deciding whether to be a guarantor! The general guarantor needs to bear limited liability. After your brother can't repay the debt and interest, you need to pay for him. After you repay, you can ask your brother to pay you back, or you can go to court to sue your brother for creditor's rights later.