Why is Xia Yinzhun called 48?

Xia Yinzhun is a character in ParadoxLive, a media combination project of HIPHOP, and its derivative works. MC is named 48. According to relevant public information, I was born in a famous chaebol family in Korea. Because of his daily movements and gestures, he is called a "smiling gentleman", but his nature is actually shaken. In the past, I was in the center of the whirlpool of power struggle and lived hard in a complicated family environment. Vowed to get back at my parents.