It is bounded on the north by the Shweli river and by an undefined line leaving the Shweli river below Manmwè village and striking the Setkala chaung between the village of Sipwa and Sagagôn. This forms the boundary with Katha district. From the point where the Katha district boundary strikes the Setkala chaung, the district marches with Bhamo district, the boundary being that laid down in General Department Notification No. 207, dated the 23rd July 1892, namely, the Setkala chaung to its source, thence the watershed between the Shweli and Irrawaddy rivers as far as the peak marked 2,949, east of Letkat; thence a straight line to the point where the Mo-hlaing stream crosses the Si-uSiptin road; thence this road to the Kaya stream opposite Si-u; thence the Kaya stream up to its source on the Shweli watershed; thence this watershed, excluding the villages on the ridge and their lands, which belong to Bhamo district, as far as Loi Chaw peak; thence the Sinran chaung till it flows into the Mawsi or Nam Hkam chaung. From this point the Nam Hkam chaung, till it fails into the Shweli river, forms the boundary, along with the area generally) known as the Triangle, which under the Convention of 1897 has been permanently leased to Burma by China.