You could maybe sub half the doubianjiang with low sodium miso, its not an exact subsitute but i figure it’ll still provide that strong flavor you want

They have the username already, they don’t need to see their profile info to search for a username

On the other hand Hong Kong has a lot of English mixed in due to tourism (and its history) so you won’t fare too bad even if you didnt know how to speak

You could learn soldering, mouse switches are super beginner friendly and they cost about a dollar each (not including the tools)

That way you can buy a nicer pair and not have to worry about it breaking