Headquarter Office: 1-18F WUHAN BUILDING, JIAHE ROAD, XIAMEN, CHINA

Plant: No. 88, Siming Industrial Park, Meixi Road, Tong'an District, Xiamen

Telephone: +86-592-5110308

Zip code: 361012

Email: dongnan@diamondtool.cn

North America Office: HRQ Trading LTD.

Telephone: +1-6472788262

Email: dn@dndiamond.com