Raw onion is one of my favorite things to throw in a dish. It has close ties to garlic which is another favorite of mine aswell. 
Onion is good for the heart too. Not the smell though!
I have a korean dish composed of rice and veggies that I always use onion with. 
I don't know if Chinese meals also have onion. My favorite dishes is Greek.
My mom was born in Israel and she always makes cuisine from there. She throws in greek foods because my dad loves them.