Objective To explore dual referral between naval primary medical institutions and hospitals.Methods 900 service men from 9 units,24 military surgeons from 4 primary medical institutions and 35 military surgeons from 2 hospitals were investigated into smoothness of process for medical service,medical seeking behavior,medical and technical level of primary medical institutions and hospitals,and structuring of medical service system. Results 78. 2% of all medical surgeries believe that process for medical serv...