hello

Hi houwenwen. You just have to look through the different forums of this site to find that out. I suspect that English, Australians, Americans are no different to Chinese. They'll discuss politics, religion, homes, gardens, pets, relationships-basically anything that comes to mind at the time. And like everyone, they'll seek to discuss issues that have importance for them personally. There's certainly no single answer to your question. It's a bit like asking what shape is a snowflake!