
I think they didn't even have a relationship before because Qu Cheng just treated him like a brother. It was all rumors that they it was mutual. But either way some people totally overreacted but I bet they'll be overjoyed after those heartbreaking chapters. Because what is about to come is just.. HAHAHA (⌒▽⌒)

I'm not sure if he's qucheng's ex unfortunately some parts of the translated novel is missing when that guy was introduced. But i do know he is the previous boss's little brother, the boss of the gang that qu cheng went to prison for. That boss is now dead and he promised to take care of the little brother that's why he can't push the brother off because of the promise and that's also why the pink haired dude is so clingy to qu cheng, he wants to use qu cheng because qu cheng is rich now with all the clubs and resorts he owns, and make qu cheng support him when he becomes the gang boss.
You might hate him a little now, but you will hate him so muuuuuccccch more later
*Spoiler
Cinian almost had a miscarriage because of the pink haired dude -_-

I won't spoil too much but the pink haired dude will caused troubles within the gang and cinian will get caught up in it, with all the fighting and such he almost lost the baby.
There will be constant fighting throughout the story and i held my breath the entire time i'm reading the novel hoping that his stomach won't be kicked. But don't worry the baby is safe and is a healthy baby boy
UMM I JUST SAW CH116
BEWARE THIS IS A SPOILER OKAY???
Y'ALL CALM DOWN, (I KNOW THAT QU CHENG LIED TO CINIAN BUT UMM IDK THE REASON WHY HE LIED THOUGH HAHAHAHAHAHAH)THAT PINK HAIRED GUY IS JUST QU CHENG EX,(I THINK IT'S HIS EX CAUSE QU CHENG SECRETARY SAID IT IS)THEY'VE DATED BUT THEY BROKE UP WHEN QU CHENG WENT TO PRISON, AND DID SOME OF YOU REALLY THINK THAT QU CHENG HAVE THE GUTS TO CHEAT ON OUR BADASS/SAVAGE CINIAN, IF HE CHEATS ON OUR GODDESS CINIAN, CINIAN WILL CUT HIS D*ICK OFF....... Okay sorry I went craxy there but clam down y'all just hate that pink haired guy a little, he's just an ex now, and cinian and Qu cheng have babies okay so the misunderstanding will probably end fast
HAHAHAHAHAH I hope this helps if it doesn't then idk just wanna share it
THIS INFORMATION IS WHAT I GOT FROM THE SPOILER OF CHAPTER 116