Abstract: Making using of the historical documents and maps，plus the author's own field investigation，this
article explores the remains of the piled rock markers built to demarcate Mukden in 1712． The evidence
verifies the lengths of line of the mound and rock pile at the south bank of Black Ｒock Gully were 23
kilometers and the gully 24 kilometers． The article affirms that Black Ｒock Gully was dry，without water
flowing into Songhua Ｒiver． The gully was not a branch of Songhua Ｒiver． The line of mound and rock
pile extending 90 li ( 45 km) was articulated during a boundary-survey in the Guangxu reign that referred
to the forged confession by Xuliang in the Kangxi Ｒeign． This deception was meant to create a false
appearance of the linkage of Black Ｒock Gully and the headwaters of Songhua Ｒiver，because this was the
pretext for the theory that the Tumen and Douman Ｒivers were the boundaries．

摘要：      本文利用古文献资料和古地图资料，再结合笔者实地踏查的经验，考察了康熙五十一年穆克登定界时筑设的堆标的遗迹，确认黑石沟东南岸的土石堆沿长约23 公里，合54 韩里，黑石沟全长约24 公里，合 57 韩里。还确认黑石沟是一条干沟，没有水流入松花江，并不是松花江支流。本文阐明光绪年间勘界时所说的土石堆 “沿长九十里”，不无参照康熙年间的许梁供辞而伪造的痕迹，目的是为了造成黑石沟与松花江上流相连的假象，因为这是土门、豆满二江说成立的前提