Am I able to have a 144 hours visa free transit for SHANGAI?

I am flying from Montreal, Canada the 22 of november and arrive in Shangai the 23 of november.. stay 4 nights ... leaving and flying the 27 of november to Singapore... taking a cruise from Singapore to Singapore (no stop in China) ... staying 2 nights in Singapore after the cruise and flying back to Montreal Canada the 20 of december... (Singapore-Shangai-Montreal direct ).... Am I ok for the free 144 hours in Shangai ?
Excuse for my english ...
Thank you !