Bing Xin · Craftsmanship ■ Gou Wenbin, Li Haoqi, entered early autumn with a blink of an eye. When we met Zhang Jingyong, an armored technician and driver of a certain brigade of the 74th Group Army, it had been more than two months since he was awarded the title of Outstanding Sergeant of the Army in 2023. At this moment, Zhang Jingyong was still busy: in the theoretical class, he explained to his comrades the amphibious tank textbook he had written; On the climbing rack of the land training ground and in the sandbox, there is his earnest training figure; Deep in the ocean, he skillfully completed difficult maneuvers while driving his tank in the stormy waves... "Zhang Jingyong, I've found you. Hurry up, join the army!" Upon hearing the words of the village cadre, young Zhang Jingyong stood up and rushed towards the county seat. At that moment, he felt the joy of running for his dreams. In the winter of 2004, Zhang Jingyong left his hometown in Shandong and headed south to Guangdong to begin his military life. At that time, this young man from Shandong who had planned to drive a taxi did not expect to be able to bond with amphibious armored vehicles and ride rough on land, chopping waves in the ocean. The vast South China Sea is filled with misty waves and treacherous clouds. During an event, Zhang Jingyong saw an amphibious armored vehicle for the first time. The thick armor, wide tracks, and high raised artillery deeply shook him. After returning to the team, Zhang Jingyong was filled with longing for amphibious armored vehicles in his heart. Unexpectedly, less than a year into the military, his dream came true - the company recommended him to participate in amphibious armored vehicle driver training. As a newcomer to the training team, the complexity of the structure and operation of armored vehicles far exceeded Zhang Jingyong's imagination, making theoretical learning difficult. However, his obsession with chariots gave him a heart that never gave up. He was like a powerful engine running at high speed, gradually standing out from the driver team. In his third year of enlistment, Zhang Jingyong had grown into a super driver. For all the components of the tank, Zhang Jingyong can become familiar with them. He always has a way to deal with the various "temper" of the tank, and everyone calls him a "technical expert" who can't be asked, difficult, or tested. Whenever he heard his comrades praising him sincerely, he would always hesitate to wave his hand and say, "What kind of 'big shot' is that? I just like to play with and ponder." Zhang Jingyong took the initiative to take on the trial training task for the first batch of amphibious armored vehicles installed in the unit, starting his life from the tool room to the cockpit of the armored vehicle. One day, more than three months later, when Zhang Jingyong stepped out of the armored vehicle, his comrades found that although his face was haggard, his eyes shone with confidence. If we cannot win on the battlefield, everything is equal to zero. "Zhang Jingyong is always pondering how to improve the tolerance of amphibious armored vehicles to various extreme environments and reduce the failure rate. To this end, he successively modified multiple parts of the tank, enabling the unit to achieve zero faults during major exercises with full equipment. By participating in the driving training again, Zhang Jingyong has transformed from a former student to the "head coach" of the entire team of drivers. During the lecture, his love for tanks deeply infected and inspired everyone. During a training assessment, pilot Xu Hang discovered that the new route was much narrower than the usual training route. He bravely drove through, but was disqualified due to hitting the limit bar. The passage is so narrow, is this an intentional problem