It's really troublesome to fix it, but she said it would break down again. Something's wrong. As long as it's not intentionally damaged, it won't break. There should be an appraisal institution in Beijing, Beijing Geo University. Address: No.29 Xueyuan Road, Haidian District, Beijing (in the courtyard of China Geo University). You can take it for identification. The cost is not very expensive, and you don't need to take the program directly. Then he will give you a bill, and you can sign it in a day or two.