Zhang Xiumin's Position in Calligraphy

When Mr. Zhang was 70 years old, his calligraphy was 8000 to 12000, which was a level. Now that he is 76 years old, he should appreciate a lot. That friend, do you have your old teacher Zhang? If it's 4000, I'll take it all, okay? Waiting for your reply. Thank you. Are there any other teachers who like Mr. Zhang Xiumin's calligraphy?