How can we overcome the bottleneck of calligraphy?

At this time, we must stick to it, don't give up halfway, and keep practicing, which is more important than anything else. You can find some teachers at this time. As the saying goes, it is better to study for ten years than to listen to you. Let them look at your work, see what problems exist at present, what should be paid attention to, how to improve it, and then start again and keep practicing. When you practice calligraphy to the bottleneck, we need to read more books, especially more.