Liu Bingsen's official script was based on Huashan Temple Monument and Yiying Monument, and he was an important leader of China Book Association before his death. His calligraphy is certainly valuable, but to evaluate one of his specific works, because the artistic works of calligraphy are expensive in people, we should also refer to the artistic effect of specific writing. This is China's unchangeable principle since ancient times.
Personally, I think that if you have enough money, you can collect very high-level master calligraphy, such as Qigong. Don't judge a person's calligraphy level by his political status. Calligraphy masters have always existed among the people, depending on whether you are Bole or not.