In episodes 29-30 of "Solemn Commitment," Xiao Zheng's plan to marry Fang Fei is disrupted by a household registration issue, leading to a heated argument between their parents. Xiao Li Ming convinces both families to hold the wedding ceremony. Meanwhile, the successful "Global Artificial Intelligence Technology Summit" takes place, and Song Qi Chang and Cheng Hai Jiang highly appreciate Xiao Li Ming's work at the Comprehensive Governance Center.

In episodes 31-32, which serve as the grand finale, why is Xiao Li Ming suspected by everyone? What truth does Xu Jing Ying reveal? Xiao Li Ming becomes suspicious when Tang Hao Ran learns from Mayor Fan that a tourism development company is interested in investing in San Gu Village. Seizing the opportunity, Xiao Li Ming acquires the old houses in the village.

Soon, the tourism development company visits San Gu Village for on-site inspections and subsequently announces a comprehensive renovation plan. Xiao Li Ming visits each villager, explaining the policies and persuading them to let go of their concerns and agree to the transformation. On the day of signing the contract, the villagers gather and sign one by one. However, Tang Hao Ran plans to incite the villagers to become holdouts, obstructing the signing and exposing Xiao Li Ming's background.

Upon learning that Xiao Li Ming is the son of Xiao Xue Song, who abandoned his colleagues to protect himself, the villagers begin to question his motives and refuse to sign. Guo Ran returns to the Comprehensive Governance Center, bidding farewell to everyone as they embark on their desired career paths, fulfilling their wishes. Tearfully, Xiao Li Ming bids them farewell.

Fang Shu Ran achieves remarkable progress in her basketball training camp and actively participates in volunteer activities, attracting numerous young volunteers to join the peace-building efforts. The Comprehensive Governance Center also welcomes a new batch of deployed staff. Guo Ran decides to return to the extended family at the Comprehensive Governance Center.

Chen Mo, a retired employee, opens the "Old Chen Mediation Room," creating a competitive situation with Yang Ming An's "Old Yang Mediation Room." Cheng Hai Jiang visits the Comprehensive Governance Center once again, where Xiao Li Ming reports on the achievements and insights gained during this period of work.

Finally, they find the answer together, revealing the true meaning of peace-building. Secondly, the power of justice. Mayor Fan Wen Zhong and Tang Hao Ran are investigated for corruption, making the villagers even more aware of the importance of justice. Thirdly, farewells and new journeys. Colleagues at the Comprehensive Governance Center pursue new job positions, and tearfully, Xiao Li Ming bids them farewell.

By not forgetting their original intentions, they will continue to achieve new accomplishments.