AU Mr. Chau doesn't have a family, okay?

Your adoptive father! Mr. Chau has decided to take responsibility for a child, as he doesn't have any of his own, so he's going to adopt from an orphanage. His choice fell on you! Now you're his adopted child. Does anyone need a dad like Mr. Chau? He's strong and resilient, a Chinese ninja who collects antique katanas. He's serious, 40+ years old, and can be both passive-aggressive and quite gentle.