In the test shed in the Jiuquan Desert in 2010, Lin Yan, an engine designer who harbored his grandfather's unfinished aviation dream, met Lu Ze, a test pilot who swore to protect the "Heart of China" because of the sacrifice of his comrades. One is obsessed with using single crystal alloy to solve the "stuck neck" problem of turbine blades, and the other is strictly pushing back design standards based on flight test safety. From the tit-for-tat in the first program review to the side-by-side vigil in high-temperature tests in the Gobi, the two have been on a ten-year journey in the research and development of domestic large aircraft. On the road, the dispute turned into a tacit understanding, and the protection was hidden in the details - she remembered that he wanted to drink warm ginger tea before the test flight, and he locked her grandfather's old drawings into the thermostatic cabinet for her; she optimized the stall warning system for him until the early morning, and he took her to see the blue clouds that her grandfather had never seen before at an altitude of 10,000 meters.
From high-pressure turbine blades to test flights under 28 extreme weather conditions, to passing international airworthiness certification hurdles, they and their team have turned "China's Large Aircraft" from drawings into reality. This is not only a hard-core epic that records the transformation of domestically produced large aircraft from technological blockade to global leadership, but also the hottest love letter written side by side between scientific research and the blue sky between Lin Yan and Lu Ze using "the drawing as a contract and the route as an appointment".
