Why was Li Chengyang fired? In fact, we should start from 14 years ago, when Gao He committed the crime of intentional homicide and was sentenced to death according to law. This Gao He is Sun Xing, because Gao He is the son of Gao Mingyuan and He Yun. Finally, under the operation of his father Gao Mingyuan, after being sentenced to death and commuted to fixed-term imprisonment, Gao He was further released on bail and later renamed Sun Xing.
After that, Gao He underwent plastic surgery. From then on, he became a newcomer, Sun Xing, and now he is at large. When Li Chengyang's master Lin Han discovered this incident, he reported to He Yun that He Yun was eager to protect his son and framed Lin Han for taking bribes, which also led to Li Chengyang's dismissal from the police station because of his close relationship.
The return of Li Chengyang is still reasonable. Li Chengyang had a problem when he went through the formalities. After signing, he left directly, and the reason for dismissal was corruption and bribery. This case was directly characterized without even checking it at that time, which was completely unreasonable. Look at the signature of the person on the resignation report. It's He Yun!
After searching for Ma Shuai's death and other cases, the steering group has discovered He Yun's villain status. Coupled with the evidence of Gao Mingyuan and Dong Yao investigated by He Yong, it can be basically judged that Chengyang must have been wronged.
In this case, if we don't take the responsibility of correcting mistakes, fairness and justice can't be fully reflected; At the same time, Li Chengyang can hide his identity and help He Yong find other evidence. Therefore, judging from the overall plot, Li Chengyang's return is still very reasonable.
Conclusion On the premise that there is no evidence to prove that Li Chengyang took bribes, his dismissal decision violated the procedural regulations. No matter after 4 years or 14 years, the wrong decision will be revoked, which is the requirement of the rule of law and meets the regulations and conditions.
Of course, it must be his own choice for Li Chengyang to return to the front line at the end of the play. Of course, he can also choose to only restore his reputation without restoring his police status, or do logistics work. After all, he has been away from the team for too long, and there are new requirements for front-line work.