《national security officer: the deadly guard was launched on iqiyi on april 27, 2018. the drama is co-directed by golden horse award director ye hongwei and mainland director gangzi, co-written by golden bell award writer chen meishan and new screenwriter sun tao. it is joined by hong kong gold medal action director chen muchuan. the new generation of high-quality idol junsheng, appearance male god huang zhiwei, taiwanese tv drama goddess fang siyu, and golden horse actress queen tianniu ccc。 li liang, a well-known senior security officer, was assigned to carry out a mission to liemen, responsible for escorting goods and protecting the country's leading environmental geologist lin jiacheng. professor lin accepted the invitation of the international blue environment foundation to go to liemen for geological surveys and research. shortly after the group arrived at liemen, chen yaohui, deputy general manager of the security company, received news that the group had all died at the workstation. just as yaohui was preparing for professor lin jiawei, daughter of professor lin jiacheng, li liang appeared unexpectedly. he didn't remember who he was, but he quickly saved jiawei in the danger. chen yaohui asked li liang to resume his post and agreed to lin jiawei's request to use his expertise to follow the service. the group began to explore li liang's amnesia step by step and search for the truth about the liemen incident.