General aviation forms a considerable part of any national airspace and airport system. Various factors, such as, pilot availability in a particular country, air traffic management, air transportation infrastructure, and aviation safety, among others, have their impacts on the general aviation market. In the global scenario, the market is influenced by several factors, such as the health of global economy, technology disruption, the price of avgas and jet fuels, regulatory standards, etc. in 2019, the deliveries of fixed-wing aircraft increased, while the deliveries of helicopters reduced. In fixed-wing aircraft, the shipments for both piston engine aircraft and business jets increased, while the shipments of turboprop aircraft decreased, continuing its fluctuating trend in the decade. On a whole, the shipments of turbine-powered fixed wing aircraft increased. The long-term outlook for general aviation, driven by the increase in the overall turbine aircraft activity, remains stable. The fleet of fixed-wing piston engine aircraft is projected to decrease over the forecast period. Unfavorable pilot demographics, overall increasing cost of aircraft ownership, and new aircraft deliveries not keeping up pace with the requirements, among others, are estimated to be the key factors contributing to the decline. However, the active general aviation fleet is projected to remain the same during the forecast period, with the declines in the fixed-wing piston fleet, offset by increases in the turbine, experimental, and light sport fleets. Th electric and light sport aircraft fleet are projected to increase during the forecast period.

Non-invasive: According to the U.S. National Library of Medicine, non-invasive refers to the tools which do not break the skin or physically enter the body. Drug delivery: According to BIS Research, drug delivery is the process of administering a pharmaceutical compound to accomplish a therapeutic effect. The most common modes of drug delivery are oral, topical, transmucosal, enteral, parental, and inhalation. Conventional drug delivery system: According to BIS Research, the conventional drug delivery system is the classical method for drug delivery into the body. Oral delivery, rectal delivery, subcutaneous delivery, buccal or sublingual delivery, intramuscular delivery, and intravenous delivery are the conventional drug delivery systems. Non-invasive drug delivery: According to BIS Research, it is the route of administration of a drug in which the systemic delivery of a drug is done non-invasively. According to BIS Research, non-invasive drug delivery refers to the devices in which the drug is delivered non-invasively or through a natural opening. The non-invasive drug delivery has various advantages over conventional drug delivery. These devices include digital respiratory devices used for inhalation of drugs such as smart inhalers, nebulizers, applications and sensors; closed-loop insulin pump (artificial pancreas), needle-free injector, and others.

快递龙头的价值增长受益于成本领先策略下对高增长市场的积极渗透。复盘看，Q2 小旺季往往是价跌利高，其核心在于成本管控在Q2 达到最佳。伴随业态和格局的演进，价格带的流动容易形成快递提价的假象。实际上，单价更低的经济件，利润率反而更高。成本管控与规模效应的共振才是快递利润率和市占率双高的长逻辑。

事件：国家邮政局公布2020 年5 月快递行业运行情况，5 月份，全国快递服务企业业务量完成73.8 亿件，同比增长41.1%；业务收入完成771.9 亿元，同比增长24.9%。