Learning sign language may cost money now. If you haven't learned sign language, I suggest you go to Xinhua Bookstore to buy a copy of Chinese Sign Language. Personally, I think it's like a sign language dictionary. Now, the sign language in this book is relatively complete. Sometimes it is helpful to translate some articles, but sometimes the sign language between deaf people is not exactly the same as that in books. Just like every region has a local language, some sign languages in books pay more attention to aesthetics and writing. If you want to communicate with deaf people without barriers, you can use your spare time to read books and get in touch with deaf people. After a long time, your sign language flexibility, sign language translation and communication with the deaf will be fine. I hope my suggestion can help you! !