“质子军”人数约5000人，是由豪族子弟中选拔善于骑射者组成的一支卫戍部队，负责保卫皇帝安全，号称“御围内六班直”，分三番宿卫。
The Zhizi Army was an elite force of 5 000 men who were excellent horsemen and archers . Chosen from aristocrat families , they were actually the armed escorts of the emperor and were on duty on three shifts a day in the palace .
御围内六班直