If the external screen is broken (touch screen), you can consider buying it. It's cheaper to repair it. If the internal screen is broken (display screen), it is recommended not to buy it. It is too expensive to repair it. After all, it is so serious that injuries are not allowed inside the mobile phone.

Htc has almost no after-sales service in China. You can check Baidu map to see if there is a special repairer there. Or you can buy accessories on Taobao and get them to the local parallel mobile phone mall for repair. Just pay a manual fee, probably around 50 yuan. Don't pay more. If you are brave, you can find a tutorial online or take the exam yourself. I just took it myself, and I changed the external screen and keyboard cable, which adds up to about 70 yuan.