On December 18th, the signing and unveiling ceremony for the C919-800 Aircraft Joint Innovation Center was held at the COMAC Design and Research Center. Based on the standard C919 model, the C919-800 is an advanced large passenger aircraft developed to meet the robust market demand for single-aisle jets, featuring a lengthened fuselage, enhanced lift capabilities, increased thrust, and improved system functionalities, with a capacity of 200 to 240 seats. The C919-800 Joint Innovation Center, located at the COMAC Design and Research Center, represents the first exploration of deep collaboration between the primary civil aircraft manufacturer and its customers during the early stages of project development.