RONGTECH INDUSTRY (SHANGHAI) INC. Address:Room 2003,No.9120 Humin road,Shanghai,China. Zip Code:200235 Tel :0086-21-64516109 Fax:0086-21-54481689 Web Site:http://www.rongtech-sensor.com E-mail:rongtech@rongtech-sensor.com droden-zhang@263.net