The 12378 hotline is the phone number of the China Banking and Insurance Regulatory Bureau, a regulatory department that specializes in supervising the banking and insurance industries. So if you have any questions about banking and insurance services, you can call this number to complain. After you get through to customer service, tell them about the problems you encountered and the person you complained about, and they will record and provide feedback for you. Generally, within 3-7 working days, the person you complained to will arrange for a corresponding specialist to call you to understand the situation and propose a solution. So when you call 12378, the other party will not ask you anything, but will record it for you and give you feedback. Call the 12378 complaint hotline. Frequently asked questions include: Insurance companies engage in fraud, inducement, etc. Complain to the insurance company and ask for the surrender of the policy. After your credit card expires, you can negotiate for an installment or make this call. You can also call this number if you are treated unfairly by a teller or lobby manager when you go to a bank branch to handle business. In short, if you encounter any banking or insurance problems or are treated unfairly, you can call this number to complain. However, please note that this call is extremely difficult to get through. Because there are so many people dialing every day, the line is always busy when I first dial. After all, the supervisory department has a limited number of operators and they have to answer complaints from all over the country, so it is normal for them to be temporarily unable to call in. You can make this call during business hours on weekdays. If you dial it a few times, you will basically succeed. It is recommended to call between 9-10 am and 3-4 pm. If you still can't get through, then try another time period and continue the call. In short, this phone call can definitely be made, but it is more difficult to make the call. If you don’t want to make a phone call, you can also send an email to the Banking Regulatory Bureau. There is an email from the China Banking and Insurance Regulatory Bureau on the official website. You can also sort out your questions and the evidence you collected, and then send an email directly. Just because there are more people sending emails, the processing time is longer. It is recommended to wait patiently.