## 1 Introduction  
At the beginning of the last century, with the vigorous development of aviation technology, the aviation industry gradually rose and formed a relatively complete commercial aviation system, which is mainly divided into public transport aviation and general aviation. Public transport aviation undertakes most commercial transport activities and establishes a relatively perfect commercial aviation support system. General aviation refers to commercial aircraft aviation activities other than public transport aviation [1]. General aviation mainly involves the special tasks of agriculture, fishery, forestry, and other industrial departments, such as flight operations and medical services, meteorological exploration, rescue and disaster relief, and cultural and sport emergency mission flight activities. However, due to the insufficient opening of low-altitude airspace in China, general aviation has been at a low level of development.  
Since the State Council and the Central Military Commission jointly issued the Opinions on 'Deepening the Reform of China's Low-Altitude Airspace Management' in 2010 [2], the state and relevant functional departments had issued guiding documents on the low-altitude economy, especially in February 2021, when the Central Committee of the Communist Party of China and the State Council first issued 'the Outline of National Comprehensive Three-Dimensional Transportation Network Planning'. By improving the national comprehensive three-dimensional transportation network, a low-altitude economy ushered in explosive opportunities for development. A low-altitude economy is a comprehensive economic form based on low-altitude flight activities carried out by various manned and unmanned aircraft. Among them, traditional manned general aviation is an important part of the low-altitude economy, and the unmanned aerial vehicle is another important part of the low-altitude economy.  
The development of a low-altitude economy focuses on a low-altitude flight, low-altitude support, low-altitude manufacturing, integrated services, and so on [3]. The core of a low-altitude economy is a low-altitude flight industry. For the healthy and rapid development of a low-altitude flight industry, the most concerning issues of a low-altitude aircraft industry (aircraft design and airworthiness safety supervision) need to be planned systematically. Aircraft include manned general aviation vehicles and unmanned aerial vehicles. Airworthiness safety supervision should take into account the operation of general aviation and unmanned aerial vehicles as a whole to form a reliable and applicable airworthiness safety supervision system. General aviation operations have accumulated some regulatory experience, such as CCAR23. However, low-altitude economy and general aviation have similarities. However, there are still many differences that need to be redefined in terms of aircraft design and airworthiness safety supervision, taking into account the existing experience of general aviation and the characteristics of unmanned aerial vehicles. The characteristics of low-altitude airspace operations are fully considered in the design of aircraft, and the adaptability development of aircraft is carried out. To sum up, if a low-altitude economy wants to develop in a healthy and orderly manner, it needs to focus on the low-altitude flight industry, the design of aircraft, and the supervision of airworthiness safety.