When the afternoon sun shines through the glass windows of the workshop, casting mottled light and shadow on the metal components, the flaw detection workers have devoted themselves wholeheartedly to the key link of product quality inspection. They hold professional testing equipment and carefully inspect every possible defect amidst the roar, guarding an important quality checkpoint before the product leaves the factory with a rigorous attitude. As the core process of product quality control, flaw detection has extremely high requirements for operational accuracy. The workers are proficient in using various testing techniques such as magnetic powder, and develop personalized testing plans based on the material and structural characteristics of the product. At the inspection site, they closely monitor the waveform and data jumping on the instrument screen, capturing abnormal signals with rich experience. Even micrometer sized cracks, pores, or inclusion defects cannot escape their "sharp eyes". To ensure that the test results are foolproof, the workers strictly follow the operating procedures and refine the testing process to every step. We strive for excellence in every aspect, from equipment debugging and calibration, workpiece surface pretreatment, to testing parameter setting, data recording and analysis. They are well aware that if a minor flaw is not discovered in a timely manner, it may cause serious safety hazards during the use of the product. Therefore, whether it is large mechanical components or precision electronic components, workers conduct comprehensive inspections one by one with the same focus and meticulousness, never letting go of any suspicious areas. During long periods of high-intensity work, workers always maintain a high level of focus. The afternoon drowsiness did not affect their work state at all, and the sweat beads on their foreheads did not slow down their movements. They cooperate with each other, repeatedly review, and communicate and discuss in a timely manner regarding areas of questionable test results. When necessary, multiple testing methods are used for cross validation to ensure that every product meets quality standards. It is these dedicated flaw detection workers who use their professional skills and dedication to build a solid barrier for product quality. They aim for "zero defects" and write extraordinary responsibilities and commitments in ordinary positions. The products that have been tested and qualified by them, with a strict pursuit of quality, have entered the market and served society, becoming a solid foundation for the high-quality development of enterprises. On this afternoon, their figures are not only the most touching scenery in the workshop, but also the most reliable guarantee of product quality.