I cannot find what the proper name of this instrument must be - any idea post here. For now I am calling it pan pipes but I don't think they have finger holes. This is from a concert brochure for the 54th Regt. Band from Library of Congress
泛管道
externalsource、flute、instrument、Instrumente、loc、music、musical、pipes
外部源、長笛、儀器、儀器、地方、音樂、音樂、管道
資料來源：openclipart ( https://openclipart.org/ )