Double or Multiple Entry Visa

Our cruise ship spends 10hours in Hong Kong on 13th April (for which no Visa is required- UK passport) and then goes to Shanghai arriving 08.00 hours on 16th April and departs 02.00 on 18th April and then arrives in Xingang 07.00 on 20th April and departs 19.00 on 21st April. What type should we apply for?