送部四镇人往单于别知故
送部四镇人往单于别知故 Send the Department of Si town People to Chief of the xiongnu in ancient china Do not know it

诗人: 徐九皋 Xu Jiugao
　　天下今无事，云中独未宁。忝驱更戍卒，方远送边庭。
　　马饮长城水，军占太白星。国恩行可报，何必守经营。