S202 Line (Ulanhot- Charlson section secondary road) was contracted by Inner Mongolia Goldway Bridge and Road Corporation. Construction began in 2003 and completed in September, 2005. With a length of 40.2 km, the total investment was RMB 179 million.  

It is the only road connecting to the Ulanhot airport, contributing greatly to the economic and social development of Hinggan League.