If you think the topic "Song Dynasty Diplomacy Surrounded by Minority Regimes" is too big, you can only write about the relationship between the Northern Song Dynasty or the Southern Song Dynasty and one of the minority regimes. A great feature of politics in Song Dynasty is the inner space and outer space, so its diplomatic relations with neighboring countries are of great research value. Why is Song a big cultural country but a weak military country? Why did you retreat step by step under the attack of Liao, Xixia and later Jinyuan? These can be studied.