YSTJ Co.

Y & S (Beijing) Opto-Electro Industries Ltd.

Y & S (Tianjin) Industries Ltd.

Room 1803, Triumph Center, 170 Bei Yuan Lu, Beijing, 100101 China

Tel: +86 10 84852211Fax: +86 10 84852233

E-mail: info@ystj.comwww.ystj.com