Head Office / Factory:

Address: No. 12, South Yunsan Road, Luogang District, Guangzhou (alongside the master bus station of southern science city)

Tel.: 020-89170888     Fax: 020-89170777       Postcode: 510663

Beijing Office:

Address: Room 402, Building 1, Information Science Technology Building of Tsinghua University, Beijing.

Tel.: 010-62962268    Fax: 010-62983389     Postcode: 100084

Northeast :       TEL：0431-86883522                     FAX：0431-86883622    E-mail：dongbei@yiwenkeji.com

North China：   TEL：010-62962268                       FAX：010-62983389      E-mail：huabei@yiwenkeji.com

Eastern China：TEL：0571-81604301/81604302      FAX：0571-81604303    E-mail：huadong@yiwenkeji.com

Central China：TEL：027-87168330                        FAX：027-87168339      E-mail：huazhong@yiwenkeji.com

South China：  TEL：020-89170888                        FAX：020-89170777      E-mail：huanan@yiwenkeji.com

southwest：     TEL：028-65978737                        FAX：028-65978737      E-mail：xinan@yiwenkeji.com

Northwest：     TEL：029-88247636                        FAX：029-88247636      E-mail：xibei@yiwenkeji.com

Henan Province：TEL：0371-63709720                    FAX：0371-63709720    E-mail：wanbang@yiwenkeji.com