平均每２３０平方公里的土地上有一名民警。你知道这说的是哪里吗？那就是被称为地球上惟一一块净土的西藏。在雪域高原，５０００多名共和国卫士守护着那块神奇圣洁的土地。今年６月，公安部部分省市公安机关对口援藏会议结束的第二天，我们就乘飞机越过世界屋脊的莽莽群山到? An average of one civilian police officer lives on 230 square kilometers of land. Do you know where this is? It is known as Tibet, the only pure land on Earth. In the snowy plateau, more than 5,000 Republican guards guard the magical holy land. In June this year, on the second day after the end of the aid to Tibet Conference organized by the public security organs of some provinces and public security departments of the Ministry of Public Security, we flew over the vast mountains of the roof of the world by plane.