Ch'à Âlsan is a kun, or county, in North P'yà Ângan province, North Korea. It occupies the Ch'à Âlsan Peninsula, which juts into the Yellow Sea. Ch'à Âlsan borders Yà Âmju and Tongrim counties to the north, and is bounded on all other sides by water. Ch'à Âlsan is home to the Sohae Satellite Launching Station.
Ch'Ã Âlsan appears as Cheolsan in South Korea's Revised Romanization and as Tieshan in Chinese records, as during its occupation by Mao Wenlong during the Manchu conquest of China.
The terrain is dominated by rolling hills, seldom exceeding 300 m; the highest peak is YÃ Ândaesan at 393 m. The offshore island of Kado enjoys similar terrain, with Yondaebong reaching 335 m. There are a total of 28 offshore islands, some of which are uninhabited. The coastline measure 123 kilometres in length, or 265 km if the islands are also included.
Ch'Ã Âlsan county is divided into 1 Ã Âp (town), 2 rodongjagu (workers' districts) and 25 ri (villages):
Ch'à Âlsan enjoys a relatively mild maritime climate, with the warmest winters in North P'yà Ângan. The annual temperature is 8.9 ðC, with a January average of -7.9 ðC and an August average of 24 ðC. Annual rainfall is 900 mm.
46% of the county's land is occupied by forests, which are dominated by pine and oak. 40% is cultivated, with crops including rice, maize, and soybeans. Clams and fish are harvested from nearby waters.
Local tourist attractions include the Pansong archipelago, known for its scenery, and the Masà Ân cavern (ë§Âì 굴). The island of Wà Ândo has been made into a nature preserve.
Educational institutions in Ch'à Âlsan include Ch'à Âlsan Advanced Technical School (ì² ì°고ë±ì Â문ÃÂÂêµÂ).