English font names are: Roboto-Regular.ttf, Roboto-Bold.ttf
The Chinese font name is DroidSansFallback.ttf
(For V6 system, the above substitution is useless, and fonts above 1M can be changed. )
substitution method
1. Copy TTF (that is, the font you downloaded, the thin gold body you can find on the Internet) to a place that is easy to find in your SDcard (such as updating the directory).
2. change the TTF font name to the corresponding Chinese and English name (see, < third > of course, it can also be changed on the PC and copied to the card).
3. Enter RE Manager to copy TTF fonts to the system folder and modify permissions (if you copy directly to the \SYSTEM\fonts folder and modify permissions, it will be stuck if you confirm the replacement).
4. Move the TTF font in the system folder to the \SYSTEM\fonts font folder for replacement, and then restart the phone.
Hands-on ability is not strong, don't operate at will, it is easy to cause problems and will not become bricks. I'm afraid you've made a mistake and can't correct it any more. Be careful with your operation!