First of all, welcome.

Nice to have another person join us here.
Second, I'm sorry you're mom's not taking this to well. However since you have only been out a few days now, there is still a possibility of her coming around about this. It may even take years, but this can be quite difficult to grasp. Of course thankfully trans people are becoming more popular in the media and living comfortably, I mean you could show her that, if she's one of those people who worry you're one in a billion or something. There is probably more than just a couple reasons she's not taking this well, so perhaps you need to find out exactly why and start showing her that in fact things are opposite of what she thinks. Whether it's about losing a daughter, or fearing change, or one of the million other reasons parents have. Maybe even embarrassment over what others will think.
At two and a half years I'm just getting through to my mum on this sort of thing, and she still doesn't get it and thinks I can just 'stay the way I am' rather than go any further. Of course my mum has just arrived at the point of saying she will read a book about it and try and get educated.
You could always invite your mom along with you on this journey. By that I mean make her think she has some what of a say in it. Make your first step a therapist perhaps and include your mom in it. Perhaps find a therapist who is trans friendly and speaks Chinese? If that's even possible, probably hard to find such a specific. But I assume she does know some english right? So an english speaking therapist may work?
Anyways I hope things do get better for you, in fact I know they will eventually, it just takes time. You always got the people at Susans to go to when things get rough though...or even if you just want to share something really amazing.