She is Chinese living in the UK. So she is more mindful and open to your culture.
The big things: don't bring up, or talk about, unless she starts the discussion - Taiwan, Chinese Politics, Uygers, etc.
Nice to haves she might appreciate:
- Taking shoes off before entering a house
- Having chopsticks at home, and knowing how to use them
- Having a hot water boiler always ready to go
- Having different teas stocked