Cruise from Shanghai-Japan ports of call-Shanghai

My husband, nephew & I are US passport holders. My sister is a Philippine passport holder. The four of us are taking a cruise via Royal Caribbean in Aug 2017 flying out of MNL to SH. The cruise will last for 6 days and will loop back on the 6th day. We all fly back from SH to MNL the same day. After MNL, my husband & I will go back to the U.S. Will we all need China visas?