《辽史·列传·卷十一》
按辽的国制，将契丹、汉人分为北、南院枢密治之，孝忠上奏说 ：一个国家设两个枢密院，这是风俗不同的原因所在。
国制，以契丹、汉人分北、南院枢密治之，孝忠奏曰： 一国二枢密，风俗所以不同。
Based on Liao's national system of separating Khitan and Han people and assigning them to the Southern and Northern Courts, Xiao Zhongshang proposed: "A country shouldn't have two secretariats. This is a custom that leads to division.