I started calibration at 2 1 year old and didn't finish it until I was 24 years old, which lasted more than three years.

However, the specific correction process depends on everyone's situation.

Adults are still slower than children.

Moreover, adults wearing stents also affect their appearance, and often going to the hospital also affects their work.

If you do, you must be prepared for hard work, trouble and pain!

But it feels great to be corrected!