Jiandao or Chientao, known in Korean as Gando or Kando, is a historical border region along the north bank of the Tumen River in Jilin Province, Northeast China that has a high population of ethnic Koreans. The word "Jiandao" itself, literally "Middle Island", was initially referred to a shoal in Tumen River between today's Chuankou Village, Kaishantun in Longjing, Jilin, China and Chongsŏng, Onsong County in North Korea. The island was an important landmark for immigrants from the Korean Peninsula looking for settlements across the river. As the number of immigrants increased, the area that the word "Jiandao" gradually changed to reflect the areas of Korean settlement.