Established in 2002, CTVON Technology Co., Ltd. is a high-tech enterprise that is mainly involved in research, development, production and sale Telephony products.

Ngnsky is in Shenzhen---the manufacture center of China.

Houyuan Technology (HK) Limited was founded in 2009 with headquarter located in Shenzhen and branch office in HK, suzhou. There are several departments such as

Shenzhen Aimmer Technology Co., Limited is a professional manufacturer focus on VoIP products and industrial mainboard. It has complete high speed SMT, assembly line, amd well-equipped testing line.

Shenzhen Tangxin Technology Co., Ltd., built up in April, 2003, is a high-tech enterprise that is engaged in professional communications software product development, production, and sales. We have sprung up rapidly in the field of telecommunication by high professionalism and popular technology. Through years' unremitting efforts, we have put out the 'WS Charge Software', 'Tansonic PBX Charge Software', 'Tansonic Phone Recording System', 'Tansonic Mini Call Center system' and a series of products. These products have been widely used in Hotel, Service center, Finance, Electric power, Police, School, Hospital, Aviation, Railroad, Factory and some enterprises.

Qihang Aegis Informatics (HK) Ltd sister concern company of Aegis Informatics Pvt Ltd is an enterprises with innovative GSM range of products, Voice Logging solution, IP PBX and VoIP Gateways.

H. K. Houyuan Technology Co., Limited was founded in 2009 with headquarter located in Shenzhen and branch office in HK, suzhou. There are several departments such as VolP, RFID, consumer electronics, SMT production and assembing. We have indenpendent R$D, sales and tech support center for each deparment.