1899 Large official cover from Heilungkiang Border Army Headquarter, Tsitsihar to the outlaying officials, applied with official seals. One
1899 Large official cover from Heilungkiang Border Army Headquarter, Tsitsihar to the outlaying officials, applied with official seals. One year later, Russia invaded and occupied Manchuria in Boxer Rebellion.1899年大型公文封，自黑龍江鎮邊軍總理營務處寄四起營官， 正背鈐官印。一年後沙俄便於義和團事件中入侵東北三省。
