C290 The emergence of the yixing group

Mu Yichen's expression immediately changed, and the look in his eyes when looking at Old Master Sai became somewhat heavier.

My hands also stopped moving as I looked at Old Master Sai with a blank gaze, and then, at Mu Yichen. Just as I was about to say something, I was interrupted by Mu Yichen.

"Grandpa Sai, I'm sorry, it's all because of my lack of consideration this time