1. Since 1979, the self-defense system has been introduced into China's criminal law, although citizens' right to defend against unlawful infringement has been affirmed in the theoretical level of criminal law, it is a luxury that citizens cannot reach in the application level of judicial practice and it is difficult to activate it.
2.20 18, the sensational "kunshan longge anti-killing case", that is, "Yu Haiming self-defense case", was rapidly fermented under the promotion of network communication, which aroused strong concern and heated discussion among social public opinion and legal scholars.
3. This case has promoted the process of China's defense system and accelerated the improvement of the defense legal system. Kunshan Town, belonging to Wuwei City, Wuhu City, Anhui Province, is located in the southwest of Wuwei City, facing Huihe Township, Tongling City across Zhusi Lake in the east.