Thanks for all the advice, it worked. I don't know why I didn't think of pressing the build/buy button. Normally i press everything I can find just to see what happens.
As for my sim's Chinese romantic interest, I've had him over to Sunset Valley where they have successfully tried for a kid (i hope, heard those chimes), however I wanted it to be a bit more realistic when my sim went over to China. Kinda feels weird inviting him over to the base camp. Reminds me too much of when I used to do lots of travelling and had to stay in hostels (not me doing the inviting! Just to clear that up, but I observed plenty of others doing that).