What is the main development of the legal system in Song Dynasty?

Compared with the previous generation, the legal system of the Song Dynasty presents many new features, which are embodied in the following aspects:

1, there are many legislations, and the law is replaced by the law;

2. The emperor directly strengthened his intervention in the law;

3. The increase of civil legislation has initially changed the characteristics of China's law that criminal law is more important than civil law;

4. Attach importance to evidence and strengthen the restriction on the admissibility of confession.