联合发行邮票是指两个或两个以上国家(地区)的邮政主管部门,共同商定邮票题材,使用相同的邮票图稿,在同一日期发行并在各自国家的邮政通信中流通的邮票。中国邮政自1990年3月3日,首次与加拿大邮政联合发行J.166《诺尔曼.白求恩诞生一百周年》纪念邮票一套2枚。该套邮票由中国邮票设计家刘向平和加拿大邮票设计家 Joint Issue Stamps means the postal administrations of two or more countries and territories that jointly agree on the stamps subject to the stamps, use the same stamp artwork, and issue stamps circulating on the same date and circulating in the respective countries’ postal communications. China Post, for the first time since March 3, 1990, issued a set of 2 commemorative stamps J.166 “Norman / Bethune’s 100th Anniversary of Birth” with Canada Post. The set of stamps by the Chinese stamp designer Liu Xiangping and Canadian stamp designer