Ministry of Internal Trade:

Tel:+86-769-82099679

Mr. Ling: 13823292269 (same WeChat account)

Miss Chen: 13798381479 (same WeChat account)

Miss Shao: 13342654789 (same WeChat account)

Foreign Trade Department:

Miss Ling: 18816856426 (same as Whatsapp)

Email: jesscia@szhaiwen.com

Haiwen Membrane switch

Tel:+86-769-82099679

Email: hw@szhaiwen.com

Factory address: No. 1001, Building 18, Silicon Valley Power Digital Valley, No. 3 Yongtai Road, Tangxia Town, Dongguan City, Guangdong Province

Shenzhen Office: No. 35 Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen