Build underground prison. "Yang Wei Shu Jin Biography": "chun fighting hard loss, then see dogmatic, Jin Luo weeks off clothes, home dungeon next few days, wishing to cook for." Tang Zhang Zhuo, "Chao Ye Qian Zai" Volume: " days later, the Khitan Li loyal Sun Wanrong the government has broken camp, to dungeon prison hundreds of Chinese prisoners. "North Korea Screen" slaves and the slave coast ":" custody male slave dungeon, the situation along the Cape rock built. "