It's very useful, thanks to @butaidongjiaoyi. I tried Feishu and found it really good. I tested translating Powell's speech, and the accuracy is quite high. With my own understanding, about 80% should be no problem. Download Feishu, then simply register, open "More" on the left side, select video conference, and choose to start a meeting. You need to turn on the microphone. If you don't have a microphone, you'll need a device with voice input. The key is to let Feishu hear the playing sound. Then open the English video you want to translate, keep it open, and play the sound. Then click the CC button in the bottom right corner of Feishu, activate the sidebar on the right side, which should initially be in English. Select the third A button on the right side, choose Chinese, and you can get Chinese information in a very short delay, which can be full Chinese or bilingual. The only drawback is that it's paid, 699 CNY per year, which isn't high, about 100 USD. If you find this price high, you can also choose the simultaneous interpretation function of , which is about 30 RMB per month, if I remember correctly. It can also translate some key content, but the accuracy is relatively lower. Once again, thanks to for really helping me out.