I have never heard of this man, so I am ignorant. Personally, if you want to collect calligraphy works, you'd better choose the works of calligraphers who are members of China Calligraphy Association, and you'd better collect the works of calligraphers who won the grand prize in the national calligraphy exhibition (so-called national exhibition). Don't blindly collect calligraphy works, let alone listen to the bluff of others, and don't trust the propaganda of the media and the boasting of some people, otherwise you may suffer.

I guess you are a calligraphy lover, too? In fact, it is very important to choose a good writing brush. You can find this article to read "Top Ten Brush Brands in China (with Selection and Maintenance Methods of Brush)", which introduces some easy-to-write brushes and how to choose and maintain them. At the same time, there are pictures of how to open the new brush and the correct holding posture of the brush. I hope it helps you ~