Headquarters: Shenzhen Tianyan Group has Shenzhen Tianyan Electronics Co., Ltd. and Shenzhen Yumingxing Technology Co., Ltd., and now has two brands: Tianyan and Yuming.

Main: student function calculator, point pen, repeater, learning machine related learning consumables and educational equipment industry product solutions
Mailing address: No. 110, South Road, Ailian Road, Longcheng Street, Shenzhen, Guangdong, China
Group website: www.tyjtw.com
First, the switchboard
Shenzhen: 0755-28991459
Fax: 0755-28996955
Email: sztydz@163.com
Second, the business negotiation line
Domestic business: 0755-28991459 15323758534
After-sales contact: E-mail: 139801103@qq.com; WeChat: 15762712587; Tel: 13689515148 (Hong Manager)
Email: sztydz@163.com
Third, complaints and suggestions
Tel: 13510355148/13689515148
Email: sztydz@163.com