闭门自守

Explanation: ① not behind closed doors, clean the body to protect themselves. ② loved justice and hated not, strictly defensive. 　　Source: "Han Wang Mang pass down": "masterpiece income, not to the tribute tax. Automorphic behind closed doors, and sat adjacent to rely on Wu to mint coins of copper, rape due to worry the public officials." 　　Examples: I If ~, Krupp will Zongbing big sweep. ★ Jing Wu Tang "Zhen Guan Zheng Yao conquest"