This person was none other than Sun Zhumei's son, Liu Longyang!
Like Liu Xian'er, Liu Longyang was a descendant of the master of Zhenbao Pavilion. However, Liu Xian'er was born to the master and his first wife; it was only after the first wife passed away that he married Sun Zhumei. Thus, Liu Longyang was her half-brother.
"You good-for-nothing, so you finally decided to show your face?"
Chapter 514