Langang Township, belonging to Ning'an City, Mudanjiang City, Heilongjiang Province, is located in the northeastern part of Ning'an City, bordering with Jiangnan Korean Manchu Township in the east, Wolong Korean Township in the south, Shiyan Township in the west, and Sea Wave Township in the north across the Mudan River. The town government is located in Langang Village. The area is 79.01 square kilometers.
In 2018, the household population of Rangang Township was 13,381. As of October 2019, Langang Township has 10 administrative villages under its jurisdiction.
In 2018, Rangang Town had 6 industrial enterprises and 10 general stores or supermarkets with a business area of 50 square meters or more.
