Core Points - The Civil Aviation Administration of China (CAAC) has issued a temporary aviation use license for the domestically produced Instrument Landing System ILS900, marking a significant milestone in the localization of air traffic control (ATC) equipment in China [1][2] - The successful certification of the ILS900 signifies the end of China's reliance on imported core ATC equipment, enhancing national security and operational efficiency in civil aviation [1][2] - The CAAC's efforts in promoting the localization of ATC equipment began in 2002, with systematic initiatives starting in 2016, leading to the certification of various ATC devices over the years [1][2] Industry Summary - A total of 92 models from 26 domestic manufacturers have received usage licenses, covering all 23 categories of existing ATC equipment, with domestically certified models accounting for two-thirds of the total [2] - The certification process for communication and monitoring devices has progressed relatively quickly, with 38 communication device models and 44 monitoring device models receiving licenses from 12 and 18 domestic manufacturers, respectively [2] - The ILS is crucial for aircraft landing phases, with about 50% of flight accidents occurring during takeoff and landing, highlighting the importance of the reliability of the ILS900 for aviation safety [2][3] - The ILS900, developed through collaboration between Tianjin 764 Communication Navigation Technology Co., Ltd. and Civil Aviation University of China, features full digitalization and smart operation based on digital twin technology [3]