Tech Pro Technology Development Limited engages in manufacturing and sales of aluminum electrolytic capacitors. The Company manufactures a variety of capacitors with different specifications under the brand Chang. During the year ended December 31, 2009, the Company manufactured 56 models of aluminum electrolytic capacitor products, comprising 37 models of lead wire type capacitors, 14 models of lug type capacitors and 5 models of screw type capacitors. Its customers include domestic and international corporations from Taiwan, Hong Kong, Turkey, Korea, Italy, Russia, among others. The Company operates in a single business segment, the manufacture and sale of aluminum electrolytic capacitors. Its subsidiaries include Changzhou Huawei Electronics Co Ltd, South Huawei (Shenzhen) Electronics Co Ltd, Huawei Group Holdings Limited, Tong Tai Company Limited, He Yue Company Limited and Hai Ji Wei Company Limited.