144 hrs visa free visit of Shanghai?

We are Swedish Citizens and will do a cruise from Hongkong to Tokyo
There is a stop in Shanghai for the day. The stop before Shanghai is Okinawa, Japan and the stop after Shanghai is Nagasaki, Japan. However our trip starts with a flight from Sweden to Hongkong and from there we will take a cruise ship ending in Japan. Can we visit Shanghai under the 144 hrs free regulation?

Best regards
Hans Hebyr