Boolean Tonghe: mainly flows through the Jilin Province Yanbianzhou, the source leaves the Hall Pakistan range, the winding southeast flows 194 miles, Hiran Jiang Xiezhong the Shuidong class comes the meeting from the right bank, east the booklet the Beiliu, met with Gaya River, also east note in Tumen Jiang. Boolean Tonghe, Manchu language willow tree ditch meaning. Flows through Antu County, the Longjing tea city from west to east, passes through middle Yanji, in Yanji urban district admission smoke collection river, also admits the Hiran river after the Yanji east end in the Tumen wine-cup floating converges Tumen Jiang's first-level branch Gaya River, merges Tumen Jiang. Boolean Tonghe span 242km, many year actual mean discharges are 14.49m3/s. The drainage area 7141 square kilometers, are nurturing in the territory a four county city urban district, seven towns, seven township 500,000 populations.
Jilin referred to as "Ji", the provincial capital, Changchun. Located in east longitude 122-131 degrees, 41-46 degrees north latitude, an area of 18.74 square kilometers, accounting for 2% of the total area. It is located in the middle of Northeast China, in Japan, Russia, North Korea, South Korea, Mongolia and northeast China, consisting of the hinterland areas of Northeast Asia. North of Heilongjiang Province, Liaoning Province, south, west of Inner Mongolia Autonomous Region, the East and the Russian border, southeast of the Tumen River, Yalu River as the boundary, and the Democratic People's Republic across the River. 650 kilometers from east to west, 300 km from north to south. Southeast high, low northwest of the Midwest is a vast plain. Jurisdiction of Changchun - a sub-rovincial city, Jilin, Siping, Tonghua, Baishan, Liaoyuan, White City, Matsubara seven prefecture-level cities and the Yanbian Korean Autonomous Prefecture.