Chen Lishan, the town veterinarian, has spent years treating local pig farmers' livestock. He takes his work seriously, follows the rules, and keeps detailed records of every pig farm's circumstances. A young veterinarian named Ma Junjie arrives and offers lower prices along with various discounts. Hoping to save 20 yuan per pig, many local farmers switch to the newcomer. Chen Lishan refuses to argue endlessly and instead stands by his professional judgment, continuing to work diligently and responsibly. As problems gradually emerge at the town's pig farms, everyone begins to realize that what truly matters has never been price alone, but reliable experience, responsibility, and a clear conscience.