Langfang Sierman Musical Instrument Co.,Ltd 

postcode: 065000

TEL:+86 316 5892025

contacts: WangLing
Phone: +86182-3267-0888

E-mail: lingwangbrass@hotmail.com 

Sierman music in USA, plesae contact as below.

TEL: （+1）331-5752373

Contact name: Jeremy Lin