Undergraduates studying in Chongqing should be familiar with Chongqing. Compared with Wuhan, Chongqing certainly has more contacts. You don't have to move things around, and you don't have to worry about your familiarity with the place when you take the exam.
Southwest political science and law is a well-known law school, and civil and commercial law is also a signboard major. Many famous judges and lawyers in the southwest and even the whole country are from western politics.
I hope you can get in no matter where you choose!