Right from the beginning of the episode, the notable development was the information that Nguyet (Huyen Sam) - a close friend of Trien - was proposed to be the head of the Trinh Tam project inspection team. Before the decision of Chief Inspector of Hoang Van Tu province, Trien appeared relieved and resolutely opposed all other alternatives.
However, Trien's (Manh Truong) concern was still clear when Nguyet had just experienced a health incident, while this inspection task was predicted to face many pressures and obstacles.
In the residential area, Ms. Phuoc (NSND Ngoc Thu) continues to be the voice representing the people of the Trinh Tam project. Faced with long-term problems related to the use of community centers and the delay in issuing pink books, Ms. Phuoc frankly pointed out that the responsibility belongs to the investor. She affirmed that the province will step in to conduct an inspection, demonstrating its determination to pursue the case to the end to protect the legitimate rights of residents.

The climax of episode 31 was a private meeting between Thieu, a powerful businessman, and Chan (Ha Viet Dung), husband of the Deputy Director of the Procuracy. With the purpose of asking for "assistance" in the issue of tax refunds, Thieu tried to put pressure on Chan. From opening words, Thieu quickly switched to direct threats, even giving words that would make Chan "argue" if he did not cooperate.
However, in the face of such imposition, Chan maintained his stance, affirming that he did not violate the law and only accepted the settlement when the dossier was carried out in accordance with the procedures. The surprise happened when Chan revealed that he had recorded the entire conversation, causing Thieu to fall into a passive position and be forced to go into the water, begging to ignore everything.
However, before withdrawing, Thieu still cleverly mentioned that Chan's wife was about to be planned for an important position in the Provincial Party Committee, a detail that showed that the underlying pressures had not really ended.
Episode 31 ended in a tense atmosphere, when the inspection of Trinh Tam's project officially became a "borderline" testing the courage, ethics and integrity of each character.
Taking the context of the fictional province of Viet Dong, "Lan Bien" sets the story in the period of administrative restructuring: merging units, streamlining focal points, rotating - appointing personnel. This sensitive moment becomes an " ethical test" for the entire public authority system, when all decisions are associated with benefits, responsibilities and many temptations.
Right from the first episodes aired, Lan Bien quickly created a remarkable attraction. The film is constantly in the top of social media discussion, recording positive ratings and towards the end, the drama is pushing to its climax.