It's funny to say that he had been Su Qianyan's bodyguard for more than 20 years, but Su Qianyan didn't know who he was.
He has known since he was a child that Su Linjin does not recognize his son and does not allow anyone to mention him. Except for Wei Changyun, no one knew that he was Su Linjin's son, and Su Qianyan certainly didn't know.
But now, Su Qianyan asked him to serve the man.