After half a century of exploration and more than ten years of struggle, the "big plane dream" of the Chinese people has come true in the new era - China has completed the research, development, manufacturing, certification and operation of the C919 jet trunk passenger aircraft, which is the first time that China has independently developed in accordance with international airworthiness standards and has independent intellectual property rights. The big aircraft industry must be done well General Secretary Xi Jinping emphasized the importance of consistent, thorough, and long-term efforts to achieve greater breakthroughs in key core technologies, accelerate large-scale and series development, and solidly promote the construction of a strong manufacturing country. Thousands of miles in the sky, the domestically produced large aircraft C919 is taking off with the wind, striving to create a new range of high-quality development. Never give up, finally realize the 'big plane dream'. During the just passed National Day holiday, 10 C919 aircraft were integrated into the busy airline network, shuttling between popular cities such as Beijing, Shanghai, Chengdu, and Xi'an. On the flight from Shanghai to Xi'an operated by C919, although Zhao Keliang, the deputy chief designer of C919 model, has boarded multiple times, he still couldn't hide his excitement after entering the cabin. "After so many difficulties and twists and turns, the dream of a large aircraft for several generations has finally been realized in the hands of our generation!" The development of large passenger aircraft is known as "a pearl of modern manufacturing industry". In the 1970s and 1980s, carrying the original "big airplane dream" of countrymen, he went to the Qinghai Tibet Plateau seven times to survey mountains and rivers, and finally was grounded for various reasons. After repeated setbacks, prepare yourself and set off again. In 2007, the large-scale aircraft project was approved, and in 2008, Commercial Aircraft Corporation of China (COMAC) was established, marking a new stage in the development of domestically produced large passenger aircraft. From project initiation to operation, the C919 embodies the perseverance of countless aviation professionals. The development team is racing against time and implementing the "611" and "724" work modes, which means working 6 days a week and 11 hours a day; During the critical period of tackling problems, work 7 days a week, 24 hours a day. We have a solid foundation in manufacturing capabilities, talent, and technological reserves, and are fully supported by all aspects. Our only goal is to make the large aircraft well, "said Zhao Keliang. The technical difficulty, complex organization and coordination, and numerous verification projects of the C919 project are beyond imagination. Since its establishment, more than 20 provinces, over 1000 enterprises and institutions, and over 300000 people have participated in the development of large aircraft, promoting historic breakthroughs in the field of large aircraft. Completed the final assembly and production line in November 2015; Successfully made its maiden flight in May 2017; Received model qualification certificate in September 2022; The world's first aircraft will be delivered in December 2022; The first commercial flight will be completed in May 2023... With independent innovation and driving industrial transformation and upgrading, we have entered the C919 final assembly plant and are assembling one C919 aircraft after another. The main components of the fuselage, cockpit cabin equipment, landing gear... millions of parts are integrated and gathered here. The design and manufacturing of C919 covers almost all industrial categories, representing a new height in Chinese manufacturing Zhao Keliang introduced that based on the actual situation, practical goals have been formulated. The C919 adheres to Chinese design, system integration, and global bidding, forming a technical route of independent research and development, international cooperation, and international standards. Focusing on independent research and strengthening key technological breakthroughs - the electric flight control law is like the "brain" of an airplane. This is a completely new field, and everything has to start from scratch, "recalled Ouyang Yifang, Deputy Director of the Aircraft Architecture Integration Engineering Technology Institute of COMAC. Without reference materials, they repeatedly simulated and calculated, constantly testing and verifying. After 10 years of hard work, domestic aircraft finally have the 'Chinese brain'. Through the design and development of the C919, China has overcome over 100 major technological challenges, driving breakthroughs in new technologies, materials, and processes, and advancing the development of fields such as fluid mechanics, solid mechanics, and computational mathematics. From products to platforms, driving the transformation and upgrading of the industrial chain - Shanghai Lingang, the large aircraft industrial park has begun to take shape, forming a layout of the civil aviation industry that integrates design, manufacturing, flight testing, and supporting facilities, attracting global suppliers to settle here. Domestic large aircraft are becoming the "new engine" for industrial development. Currently, there are over a thousand global orders for C919 aircraft. Some institutions predict that the C919 is expected to bring a trillion yuan market size to industrial chain enterprises and drive the supply chain to a new level. Flying towards the future, entering a new stage of operation. On September 19th at noon, China Southern Airlines CZ3539 flight with the words "C919" took off from Guangzhou Baiyun Airport and headed towards Shanghai Hongqiao Airport. Mr. Chen, a passenger, specially came to experience the first flight of China Southern Airlines C919. The spacious seats, ample charging ports, and low noise all left a deep impression on him. "It's very comfortable and proud, and there will be another choice for future travel." This flight also marks the commercial operation of C919 by China's three major airlines, Air China, China Eastern Airlines, and China Southern Airlines, and the large-scale operation of C919 has entered a new stage. A good airplane is made and flown Hu Yongqing, Deputy General Manager of COMAC Customer Service Company, introduced that in order to ensure the smooth introduction and subsequent smooth operation of the C919 aircraft, COMAC works closely with airlines to fully promote aircraft selection, production supervision, personnel training, operational support and other work. Nowadays, the efficiency of C919's market operation is improving, and various civil aviation units continue to enhance its support capabilities. As of now, 10 C919 aircraft have been delivered, operating 8 routes and serving 6 cities. They have accumulated over 10000 hours of safe flight and carried nearly 600000 passengers safely. On the same day of the first flight of China Southern Airlines C919, a C919 plane landed smoothly at Gongga Airport in Lhasa, Xizang, thousands of miles away. This is the first time that the C919 aircraft has arrived in Lhasa. We have conducted multiple research and development test flights here, laying the foundation for meeting the operational needs of high-altitude routes and the development of high-altitude models in the future, "said Yan Zikun, Assistant Chief Engineer of the C919 aircraft. Flying out of the country for the first time and making an appearance at the Singapore Airshow; Complete the first cross-border commercial charter flight; The C919 aircraft is continuously expanding its "flight boundaries" and exploring new markets by completing its first commercial flight fueled with sustainable aviation fuel. (New Society)