Mr. Yang is the vice president of China Calligraphy and Painting Newspaper, the executive director of China Artists Association, the executive director of China Calligraphy Artists Association and the director of the World Oriental Culture and Art Institute. His painting and calligraphy level has been affirmed, and he has a high position in the professional field. This shows that his works may have high artistic value and collection value.
Shi Lianhai is also a talented painter, but compared with Yang's works, who is more worthy of collection needs more specific evaluation. This requires in-depth study and understanding of the works of the two painters, including their artistic style, personal preferences, creative background and so on.
Therefore, you can't simply give an answer. If you are interested in the works of these two painters, I suggest you know more about their works and artistic styles in order to make a more informed decision. At the same time, collecting art is a very personal choice, and your decision should be based on your love and appreciation of art.