Hong Jiaguang, a senior technician at China Aviation Engine Group's Liming Aero Engine Company in Shenyang, started as a fresh graduate from a technical school. He grew into a senior technician, decrypting Western secret technology at the age of 39 and making significant contributions to the precision machining of Chinese aero-engine blades. As the "crown jewel" of modern industry, the precision machining of aviation engines is crucial for national security. Hong Jiaguang's team not only overcame the technical challenges of machining precision but also demonstrated an unwavering spirit of craftsmanship. Their story reminds us that with firm beliefs and relentless efforts, one can overcome difficulties and create brilliance.

Is this true? Dear viewers! Welcome back to our channel! I am delighted to share and discuss today's topics with you: 1. How did Hong Jiaguang grow from a fresh graduate of a technical school to become a senior technician at Liming Aero Engine Company? What were the key turning points in his career? 2. What does the precision machining of aero-engines mean for national security? How did Hong Jiaguang and his team's technological breakthroughs improve the country's aero-engine manufacturing level? 3. What difficulties and challenges did Hong Jiaguang encounter in his work? How did he overcome these challenges and maintain his enthusiasm and dedication to his career?

Aero-engines, as the pinnacle of modern industrial achievements, are hailed as the "crown jewel." They symbolize not only the comprehensive scientific and technological strength of a nation but also a high-tech product that only a few countries in the world can independently develop. In an aircraft, the engine plays a core role, and its performance directly affects the safety and efficiency of flight. The precision of assembly is crucial for the engine's performance because thousands of blades must fit precisely with the disk. Even the slightest error during high-speed operation can lead to catastrophic consequences.

In the manufacturing process, some engine components require extremely high precision, reaching an astonishing level of 0.003 millimeters, while the current CNC machine tools on the market can only achieve a machining precision of 0.005 millimeters. In this context, the workshop where Hong Jiaguang works becomes crucial. They are an indispensable part of the aerospace engine production line. Hong Jiaguang and his team are responsible for making jigs and tools specifically for the precise grinding of fighter jet engine blades. After countless observations, recordings, comparisons, and adjustments, Hong Jiaguang and his colleagues endured indescribable hardships. They constantly strived for perfection in detail, ultimately breaking through technical bottlenecks, achieving incredible precision improvements, and bridging the subtle gap between existing technology and requirements.