Would be going to china very soon, I heard that its very cold during this time as the air is wet. Its something like -3degrees Cel.
What part of China are you going to? I'm assuming somewhere northern, like Beijing, for it to be that cold on average.
If you're going for Tibet, the altitude and the customs would crop up other issues than the cold.
I have not been to a winter country before and as such would like recommendation on what type of winter wear to get and whats the best in keeping the cold away without looking like an eskimo.
Layer, and wear long underwear.
That really is it.
Remember that most of China didn't get access to fancy synthetics until pretty much the last five years, so cotton and wool are going to be the primary winter materials. Children are taught from a very young age to heavily layer. You will primarily see layered cotton and wool, and the occasional synthetic jacket for the very well-off.
What type are the best because living in Asia, might not be able to get the brands available in the US.
As long as you are in an major city, you should see no distinct differences between the quality of clothing you will be able to purchase. Thanks to global trade, they will also be at similar prices after currency conversion.
Synthetics are still more rare though, so if you want good synthetic jackets, buy them in the US. Jacket should look as casual-wear as possible. Avoid the "hiker look" and bright colors, which can make you stand out quite a bit in China. Dull colors will make you blend much better.
If you are not going to be in a major city, though, stock up on good quality wool and synthetics in the states.
What other items are needed?
Gloves and lotion against frostbites.
Your standard traveling medicine, like immodium, in case you never get used to the local food.
If you're not going to stay in a heated hotel the entire time, fleece blankets for sleeping. For some reason good fleece never really caught on in China.
Don't EDC multiple things. If you do EDC, deep pocket them. Don't let anything large print through clothing, such as multitools. In cities violent assaults and robberies shouldn't happen anymore than it does in the good parts of the US, but petty thievery - pickpocketing and the like - have been worked down to an art. Don't leave anything printing or out of your sight if riding public transportation.
(Answer this: So is this an outdoor adventure thing, or an urban business travel?)