• 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