Stockholm-Shanghai-Hongkong and return, eligible for 72 hours visa?

Hi,

I will be travelling from Stockholm to Shanghai with SAS, and then from there fly domestic to HongKong with Dragonair.
When returning from HongKong to Shanghai, I wish to stay for approx. 65 hours in Shanghai before my flight leaves to Stockholm again.

Am I eligible for a 72-hour policy?

Thank you!