From what I know about at the end of this chapter, survival in China is recommended for those that are capable of surviving long enough to make it. In my opinion, Han getting killed in the process due to his chances of survival was slim since the world is a hard place, Ace!
The abacus is a mathematical instrument used mostly by Chinese to calculate and is still in use now. The way to use abacus is quite complicated. You can Google it out.
I am going to take a guess now, and wait until the end of East Asia: Ronin is the Head Hunter. He was planning to recruit Han into SOMBRA, but Zhao Mei, indoctrinated by Ronin, killed Han and reported the murder to Ronin to get him to select her.
An eyes on Ronin and Blind Sen. I have vibes on the blind dude, don't know why. Usually Ronins also known as a rogue samurai in japanese culture are known to be independent. SOMBRA must have use some sort method to influence children. I'm really excited what would happen next. Next is to Sichuan! The land of the spicy Mapo Tofu.
Ace you mention to suggest a game then I suggest you will play The Walking Dead Michonne I LOVE ALL YOUR VIDEOS ACE I'VE BEEN WATCHING YOU FROM THE BEGINNING
I think that Sombra or the Hunter is like slaving children or convoking them to form an army. Ronin was probably sent to get children and Mei is one of them.
i had a terrible foreshadowing, what if for the first time in the last case of world edition, Lars family dies ( hope i'm wrong) but this could explain why the triplets are living in the Bureau!