In September 2022, the C919 large passenger aircraft completed all airworthiness certification and obtained the type certificate issued by the Civil Aviation Administration of China, indicating that our desire to take domestic large aircraft is getting closer. Since the first C919 rolled off the production line in November 2015, from the first flight to the six-plane elephant walk, from the splash test to the maximum braking energy interruption take-off test, I used my camera to record the history of COMAC's work for the C919. The moment of significance, specially produced to record the most beautiful moment during the C919 forensics period "The Trilogy of Domestic C919 Large Aircraft", I would like to pay tribute to all COMAC people with this film!