I am a student studying in Malaysia, i have however completed my studies in Malaysia and am about to tranfer to Canada in january, I was about to get a ticket and realised that some of them have layover in hong kong or shanghai, i was wondering if a transit visa was required for any of these places as the layover is at most 6 hours, also if i wished to spend a day or two in any of these places, would that be possible, what documents would i need to show? thank you very much, have a nice day.