General Projects: New material technology research and development, Musical instrument repair、 debug, Professional design services, Intelligent unmanned aerial vehicle manufacturing, Sporting goods and equipment manufacturing, Import and export of goods, Civil aviation material sales, Metal structure manufacturing, Electric motor manufacturing, Musical instrument manufacturing, Musical Instrument Wholesale, Musical instrument retail, Musical instrument parts sales, Luggage manufacturing, Internet sales( Except for the sale of goods that require a license), High-performance fiber and composite material manufacturing, Sales of high-performance fibers and composite materials。( In addition to licensing business, Able to independently operate projects that are not prohibited or restricted by laws and regulations) Licensed Projects: civil aircraft( engine、 propeller) Production, Design and production of civil aircraft parts。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments, The specific business projects are subject to the approval documents or licenses of relevant departments.)