1. Hone: refers to constantly improving one's level and ability through repeated practice and tempering.
2. Continuous improvement: refers to constantly improving and strengthening one's skills on the original basis and pursuing a higher level and realm.
3. Perseverance: refers to persistent practice and study, and continuous efforts to pursue progress.
4. Sustainability: refers to continuous practice and learning, and constantly improve your skills and abilities.
Diligence can make up for one's own shortcomings and improve one's skills and level through hard work and constant practice.
6. Study hard: refers to studying hard, working hard and constantly improving one's skills and realm.
7. Accumulation: refers to expressing yourself with greater strength and skills through accumulation and precipitation, and waiting for opportunities to come.
These idioms can be used to describe the state and mentality of continuing to practice calligraphy and express the determination and belief to improve one's level and ability through continuous efforts and pursuit.