Why should I be wary of my browsing data being sent to China?

Hi all,

I don’t really know how to ask this question. On one of my devices, I downloaded a web browser (Opera) and one of my friends made fun of me, saying that “you better like China knowing all the stuff you do online”.

I read the Opera website and it says it’s a Norwegian company, but on Wikipedia it does say it was bought by a Chinese company.

My question is: what does “China” do with my personal browsing data? Why is it useful for them? (and who are we referring to here, is that the Chinese government, a private company, who?)

I’m looking forward to learn more about digital privacy, but I don’t currently understand the “obviousness” of how it is wrong to use Opera.

I’m a tech enthusiast (hence why I’m here), but I’m cognizant that I have large knowledge gaps in some of these topics.

Thank you in advance.