1. refers not only to the Jin Dynasty, which is the most admired in the history of calligraphy, but also to its popularization and progress.
Literally, it means to improve one's cultivation and attitude towards life, which means that people who study calligraphy can improve themselves. Homophonic sincerity, sincerity, the stone is open, as long as you work hard, you will always achieve something.
3. The school that studies calligraphy, when it enters the room, means getting started. It can also be understood as a temple, which means noble.