Huanling cemetery is the tomb of Huanrong people, and the title of lineage remains to be verified. The cemetery is located 2.5 kilometers north of Longkangji. The northern tomb is 50 meters long, 40 meters wide and 6 meters high, while the southern tomb is 80 meters long, 50 meters wide and 8 meters high. It's called Shuanggudui and belongs to the Han Tomb. Ancient couplets "Huiyuan Bridge North Huan Cemetery, Monument to South Martyrs in Ancient Seoul"
Longkang is located in the center of Huaiyuan West, Phoenix Taipei, Mengcheng East and Su Xiannan, and controls the throat of land and water transportation. This is a military location and a market town with prosperous economy and commerce. Longkang County was established in BC 137, and later became a county, with a history of more than 2,000 years. It is the hometown of Huan Rong, a master of Confucian classics in the Western Han Dynasty, and Huan Wen, a famous scholar in the Eastern Jin Dynasty. Long Kanghuan's family passed through the Eastern Han Dynasty, the Three Kingdoms, the Western Jin Dynasty and the Eastern Jin Dynasty for 362 years and spread to 1 1 generation. They all have civilian military commanders serving in North Korea. There were five imperial divisions in the first three generations, and 17 generals in the last three generations held military power and guarded important towns. During the Anti-Japanese War, General Peng Xuefeng led the Eighth Route Army and the New Fourth Army to open up anti-Japanese base areas, and established Huaishang Office (administrative office) prefecture-level political power in Longgang, with remarkable achievements and brilliant results. 1999, the memorial hall was built in the former site of Huaiban, becoming a red tourist attraction. In 2002, Longgang Guohe Bridge was completed. "One bridge flies in all directions, and the two rivers flow brightly" has created an opportunity for the economic take-off of Longkang and its surrounding areas and brought convenience to the people.