Sky Blue 11 Co Ltd, formerly Balk 1798 Group Limited, is an investment holding company principally engaged in the jet management business. The Company operates its business through five segments. The Jet Management Services segment is engaged in the provision of jet management services, aircraft sales services and pilot training services. The Yacht Businesses segment is engaged in the manufacture and sale of yachts and other yacht related businesses. Design and Sales of Integrated Circuit segment is engaged in the design and sales of integrated circuits and semi-conductor parts used in industrial and household measuring tools and display products. The Property Investment segment is engaged in the rental of residential real estate. The Headquarter and Others segment is engaged in the corporate administrative and investment functions performed by the headquarter and the provision of financial leasing services.