This postcard was postally used in 1936 (the stamp is removed and it’s difficult to see in which country).  The PC is part of an international series which shows aspects of Salvation Army work. It is numbered 505 and shows SA missionnairies on a Chinese river boat. “By this and other novel means of travel the message of deliverance is carried to multitudes who never before have heard the Saviour’s name”. The SA’s ministry opened in mainland China in 1916 and quickly expanded across the northern and eastern provinces until 1949, when it withdrew from the mainland due to hardship after the Chinese Civil War.  The SA established some new work in China in 2017