Long Live the Emperor.

He knew Lay was going to kill their great-uncle, he told him about it and he actually pushed him to do so, when he started to show some hesitation. That man was the cause of the begging of the decline of Zhou family, to him it was only legit to get rid of him. And considering all the monstrosities that man committed, is there really someone who could blame them to take his life in advance? He knows it will change the course of the future, but maybe the new bad consequences will still be less bad than what the old General did in the previous past.
He calls it a win-win, but it's not over yet, there is still much to do.

Why was Lay worrying about saving LianBi's life, over 35 years before the attack that caused his death happened? Maybe MoonBin should have asked that to himself, because the two Zhou, alone to freely mess up the past as they please, can turn out into a serious problem, mainly due to Jin.
Lay knows almost nothing, even about their own time. He has never bothered much to study and learn, but Jin knows. And what he doesn't know, he can still easily find out.
It was Jin to make an assumption on where the home of the daughter of the Emperor and her family would live and it turned out correct.
It was himself with Lay, in front of the Huang residence. And unlike LianBi thought, they were there for him.

Now, they know where LianBi lives, they also know where he often goes: TangSu. Both his grandmother and shifu live there, close close to their hideout.
Although the boy is almost always guarded, how hard can it be to lure such a young and naive kid somewhere safe to take him?
The only difficult part, to how he sees it, will be to convince that person who is the only one he knows to be able to do what they need.

Taking profit of Yichuan's gratefulness, Lay finds out where the person in question is: prison. Crime? Not specified, but he is dedicated to execute the fellow prisoners as soon as they set a foot in his same cell, for the amusement of the Prison Guards.
No doubt that is the person they are looking for and again, in order to pull him out of prison, they have to requires for the help of the only powerful man they know, for now, in Xhuanghen: Yichuan.
Lay uses the money be received from Meredith to both bribe the right people and to pay the required price to have Yang Yang released from the Imperial Prison.

Everything goes smoothly, strange how everything goes well when doing something wrong.
Jin meet Yang on his own, after he was offered to wash and to eat in Zhendong manor, and he tells the man the reason of his interest towards him.
He doesn't tell Yang they come from the future, but he gets the impression he knows anyway.
Since even Yang was much less righteous at that time, before meeting Bokho, it's not even hard to convince him to do what they ask for. He doesn't hesitate to accept, like he was only waiting for the opportunity to do that.

Set everything with Yang, the Zhou brothers can proceed with the plan.
They manage to attract LianBi away from his shifu's school before the lesson begins, after his father left, and they take him. They use a soporific potion to put him to sleep right away and simply carry him to the place where Yang told them.

What happens next? A delirium. Imperial and Palace Guards, mercenaries, armed nobles, private militias everywhere, searching every house and inch of TangSu.
They aren't late to arrive to the brothel too.
The search for LianBi in the brothel lasts about 2 hours, they search every inch, question every person, and not in a soft way. Some people get beaten badly out of no reason, some get even taken away in chains.