Degang Guo and Cao Yunjin, who feels sorry for whom?

From all the known clues, Degang Guo and Cao Yunjin feel sorry for each other.

At first, Cao Yunjin studied crosstalk with Degang Guo, and Degang Guo paid a lot for it. Later, Degang Guo became a famous wrist, while Cao Yunjin became a small wrist. Degang Guo's handling of Cao Yunjin is not commensurate with Cao Yunjin's efforts. At this time, Degang Guo felt sorry for Cao Yunjin. Cao Yunjin withdrew from Deyun Society when Degang Guo was in danger, scolding Degang Guo's fault, but Cao Yunjin was sorry for Degang Guo.