environmental qualification

Period: 2019-12-16 / 2019-12-31

Certificate Encoding: -

Certification bodies: 北京中经科环质量认证公司

business license

Period: 2019-06-14 / 2031-01-10

Certificate Encoding: -

Certification bodies: 天津市静海区市场监督管理局

ISO9001：2015

Period: 2018-07-18 / 2021-07-18

Certificate Encoding: -

Certification bodies: 北京中经科环质量认证有限公司