Transit Visa for 72 hrs arriving at on a Cruise Ship at Shanghai and departing my plane to UK

My husband and I will be cruising in August starting in Seward, Alaska and ending at the port in Shanghai. We will be having 2 full days before leaving on the morning of the third day by plane from Shanghai to the UK. On one of our full days we will be flying internally to see the Terraccota Warriors. Can we do this on the free transit? If so where do we apply for this?