1. The trump cards of Chongqing University are mining engineering and electronic information engineering. The ace major of China Ocean University is marine science and technology, and the law major is the key major of Hunan University.

2. The secondary colleges affiliated to the Law School of Chongqing University and China Ocean University are relatively weak in law major, while the law major of Hunan University has a strong legal research team and first-class teaching. There are a variety of training modes such as undergraduate, master's and doctoral programs, providing excellent courses, interdisciplinary course and interdisciplinary research.

3. To sum up, the LLM of Hunan University is better.