Group 1 - The core viewpoint of the articles highlights China's ongoing efforts to localize its aviation supply chain, particularly in the context of the successful development of the C919 aircraft, which has garnered significant attention for the country [1] - The Longjiang 1000A engine, crucial for the C919, is reportedly making good progress in its development, representing a significant step towards China's self-reliance in aerospace technology [1] - The approval of SINOPEC AEH I, China's first domestically produced aviation hydraulic oil, marks a milestone in the country's aviation sector, making China the third nation globally capable of producing aviation-grade phosphate ester hydraulic oil [2] Group 2 - The AES100 engine has received a production license and sales contracts, being the first domestically developed 1000 kW class advanced civil turboshaft engine that adheres to international airworthiness standards, indicating a major advancement in China's aviation capabilities [2] - A new lightning protection technology system has been introduced by Hefei Aerospace Electric Physics Technology Co., which aims to enhance the safety of commercial aircraft in complex weather conditions, potentially improving the reputation of Chinese-made aircraft and facilitating overseas airworthiness certification [3]