My husband and I are doing a cruise from singapore to shanghai.

We arrive in china 13.00 on 4/4/17 and depart
11.00 on 5/4/17 then arrive shanghai 07.00 9//4/17 then stay one night and fly back to Australia 4.50pm .
Could you please tell me what type of visa would be needed for this trip. We are very confused as everyone tells us something different. Many thanks Vicki and Colin.