personal humble opinion, if you want to do commercial promotion, you must .com . Other domain names have almost no promotion value. Don't listen to the domain name sellers to fool you. I guess not many people have noticed that the domain name of ele.me is ele.me

if you focus on personal brands, domain requirements will be much looser, even .me . If you are promoting individual or team open source products, then the .io domain name can also be considered

be sure to choose .com unless you find a particularly good .cn domain name
experience

com is the international top-level domain name, the abbreviation of company, and cn is the national top-level domain name, the abbreviation of China

preferred .com. If the company has domestic and international business (including Hong Kong, Macao and Taiwan), you can register .cn (or .com.cn) in China and .com abroad to facilitate your use.

does not affect the knowledge of domain names; it's just that .com is more popular. 1

COM domain name is preferred.
it is good for small and medium-sized enterprises and individuals to use CN domain names, unless some large enterprises choose high-quality COM domain names for the sake of their corporate image.
the above answer I don't know what the question is, why step on my answer, boring.