How to sort the generations in calligraphy?

Besides the teacher-student relationship and elders, how can there be seniority? Besides, the prices of the same and different calligraphy and paintings are different in different people's eyes, but no matter whose calligraphy and paintings are good or bad, there are valuable and worthless, expensive and relatively cheap, so we can't talk about the square in general, we can only say how much a picture is. Long Ge has no clear purpose, but only a reference, mainly depending on his own judgment and understanding of his paintings and calligraphy, as well as the hype in the market at that time. The price of a painting and calligraphy will be different in different places, different times and different auctioneers. So it is difficult to judge, and it is not an absolute price; Besides, any personal evaluation is only one-sided and personal. Close-ups, celebrities and people who especially like them may make the price higher. As long as there is no problem, it is collectible. So it has nothing to do with seniority. My own opinion, please forgive my mistake!