Visa requirements for back to back cruises entering into China

My husband and I are Australian citizens who are sailing from Singapore on a 17 day cruise which overnights in Hong Kong on day 8 of the cruise then has a stopover in Shanghai on day 12 for 11 hours, finally berthing in Beijing (Tianjin) on day 17, the last day of the cruise. That same evening we will be departing on the same cruise ship visiting the exact same ports for the exact same time but in reverse order back to our starting point in Singapore.
The cruise line has stipulated that we need a double entry permit for China in their list of requirements for each 17 day cruise.
Our question is do we now need a multiple entry permit to cover us for both cruises?
Joan