Damn all these hints about their father being dangerous makes me really curious about them...

I hope we can see them too im anxious...

I have a theory that both he tian and Jian Yi has the same father but different mothers

they're definitely not related though. someone wrote this a bit ago which helps to understand. http://www.mangago.zone/home/mangatopic/3620952/

I think both he tian and Jian yi has same father but different mothers because in chapter 105 the father appeared in that dream after he tian appears in the series and 136 they were the same guy... Somehow the father does look like he tian and he Cheng.. and sometime jiang Yu has expressions like that of he tian when he is being evil or something like in chapter 100.. so there might be a little possibility that jiang yi is the half brother of he tian and he Cheng and that the both brothers know about this.
I mean this is just a theory I made up in my mind while I was reading it, and I'm still curious about how the story would turn out when their fathers are going to be revealed.
After reading the link it made me more curious about the father thing and that they are not half brothers would be true, I was also thinking of that possibility as well, it was just 50-50 percent possibility of anything ( being half brothers or not ), we just have to wait and watch how the story is going to unfold and all.

Interesting theory.. I agree that it could be that they’re really brothers or related even i mean they could just have taken their mother’s last name that’s why they have different last names who knows, but base on the latest chaps my guess is He tian father work to Jian Yi’s father he could be his right man or something until he passed the position to He Tian’s brother, and the reason that Jian Yi’s father left him is because his dad made a promised to his mom that he wouldn’t involved their son to their business but since Jian Yi’s had been kidnapped they have no choice now.

okay but the father appearing in a dream after he tian appears in the story literally doesn't have anything to do with him and there is no valid connection between that. its not like jian yi had a dream/flashback with he tian and his father both in it to connect them somehow. those are two separate things and he tian appearing in a chapter beforehand in a chapter before has no connection to it. plus its not like it was he tian's first appearance.

also the father has light silver/grey hair and we have yet to have seen his face. he cheng and he tian have black hair so I don't see any resemblance between jian yi's father and their looks. and having similar facial expressions expressing emotions doesn't prove anything either, that would be like me saying 'he tian grinned here but so did xi so they must be related, it was similar expressions'. so far these mostly just seem to be reaches. I'm not trying to bash you by the way, I hope it doesn't come across this way lol -- I feel the need to clarify because sometimes I feel like tones can get lost on the internet. I'm just discussing and explaining to you why this theory is 99% unlikely.

not to mention the many other reasons listed in the other linked post. I'm curious to see how the fathers would be revealed too ... we probably won't see jian yi's father until he gets kidnapped and its hard to know when we might seen he tian's dad. or actually any of the fathers.. as in fully revealed. old xian seems to love not showing the fathers either at all like zhan zheng xi's and he tian's, or just their faces like jian yi's and mo's. like you said, its a waiting game when it comes to this story.

I think your theory, the theory that jian yi's father and he tian's father have their own separate mafia groups [as they both seem to be bosses] that have a certain respect towards one another, which leads to he tian's father loaning he cheng to jian yi's father as a underling/righthand man years later the most likely theory. i don't think they necessarily work together on plans and shizz but the groups certainly know of each other and have a connection through he cheng which leads me to believe that they at least respect one another in a business like way. it makes the most sense out of everything tbh. cause it's clear he cheng used to work for their own father as seen from he tian's flashbacks from when he was young.

Im wondering if He Tian and his brother have different mothers too..

Its going to be a long wait for us (⊙…⊙ )