1919年黑龙江省龙江俘虏收容所战俘汇款专用封1件，使用，填写有位址，汇款金额等内容，盖收容所红色检查戳，保存完好，为非常罕见及特殊之中国境内一战战俘邮件，目前已知存世仅4件ChinaPostal HistoryRepublic of China1919 a cover from the prisoners remittance of the Longjiang captive shelter in Heilungkiang Province, with red censor handstamp. The contents of the address and the amount of the money. It was preserved and was a very rare in China. Currently known as only 4 pieces
