Stone's digital skills are a good fitness and treatment method, which is true.

The number of times to read numbers should be determined by time. Generally, you should read the number four times a minute, but it is best not to remember the number of times when practicing. It is better to practice naturally, that is, to practice until you don't want to practice, or to stop temporarily when you have a strong reaction.

Generally speaking, it is better to practice for at least 30 minutes. Keep practicing, and the practice time will naturally extend. It took about 10- 15 days to show it. Stick to it and the effect will come out.