At precisely 16:58 on August 12, Air China Flight CA723, operated by China's indigenous large aircraft, the C919, smoothly touched down at Ulaanbaatar's new airport in Mongolia. This landmark event marked the inaugural successful operation of the C919 on a regular international commercial route. The route, which facilitates a daily round-trip between Beijing and Ulaanbaatar, heralds a new chapter in the international development of China's domestically produced large aircraft.