Airline Carry On Rules For Luggage

what brand of carry on is good for flying to china? my airline (air china) only accepts bags that are 21 inches long by 15 inches high and 7 inches deep (which seems rather small).. any suggestions?

sirgarycoleman2000 asked: I’m contemplating shipping my computer through the mail or checking it. Either way, I want to take at least the harddrive carry-on with me, so it won’t get damaged. However, will this be allowed? Would the security think it’s some weird bomb-like contraptioAlso, would I be able to get away with taking stuff [...]