skopje-shanghai.....skopje-shanghai-bangkok-shanghai-skopje

Hi, I am currently in Shanghai, finishing my studies. My student visa expires on 30th November, so my return ticket to Macedonia was booked on 30th November. Now I want to change the date of the return flight to Macedonia on 10th December. In meanwhile, because I will not have student X, I want to travel to Thailand. So, my questions, will I be able to do this:
- flight to Bangkok on 30th November with limited baggage,
- lock the rest of the baggage on the Shanghai airport,
- then on 10th December flight back to Shanghai from Bangkok, take my locked suitcases from the airport in Shanghai, and then check in for the second flight to Skopje,Macedonia?