Visiting China on a cruiseship

I am a Norwegian Citizen and will in March visit 3 ports in China as a passenger on a cruiseship (P&O) - Shanghai the 3rd March, Xiamen the 5th March and Hong Kong the 7th to 8th March-

I know that Norwegian Citizens do not need Visa for Hong Kong, but what about the 2 days in Shanghai and Xiamen??

Can I visit them under Article 22: in The Exit and Entry Administration Law of the People's Republic of China
where it says:
(3) Hold connected passenger tickets and are in transit to a Third country or region by an international
Aircraft, ship or train via China, will stay for not more than 24 hours in China etc.etc.