Question should be.. where to?

China

China is big. South and north for me quite different. North is much colder compared to the South. Well, that's what I feel anyways.

I am used to the cold so I am not too sure about your tolerance. Protect the ears and lower half of the body is much more important for me.

Hmm, Sichuan..But will include some mountain/hill peaks as well.. End of Dec-Jan.
It's my first time so I do not know my own tolerance as well

Uniqlo.

And if you're going to China, my warmest winter jacket bought from China. Damn cheap and last damn long.

Uniqlo's look so thin. Are they warm enough?

Layer up.
Their heat tech is pretty good for me. I like how their products are thin yet warm.

I see. Thanks