September 2010, after the Shenzhen Municipal Science and Technology and Information Bureau, the Municipal Finance Bureau, the Municipal State Taxation Bureau, Local Taxation Bureau multi-party audits, Shenzhen Science and Technology Co., Ltd. Castleton was named national high-tech enterprises. The audit found the work of the high-tech enterprise business performance, patented technology, new products, and so made a very high demands. Castleton technology always adhere to the development, production and marketing of medical optical instruments and other medical equipment as the main business direction, and increasing high-tech R & D investment, this was named national high-tech enterprises, the company further development, improve the comprehensive competitiveness of enterprises to provide more and more powerful support. Tech enterprise means within "high-tech fields supported by the state", continued research and development and technological achievements transformation, the formation of core intellectual property rights, and as a basis to carry out business activities in China (excluding Hong Kong, Macao and Taiwan regions) registered more than one year of resident enterprises.