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![]() Our History 2013 Establish a research and development center 2014 ZK-Best Joint Company was established 2015 Successful development of nanomaterials and mask 2016 Established a fully automated production line , formulate the ISO9001 quaity manager system, and the first batch companies has passed the national PM2.5 mask certification 2017 Obtained National High tech Enterprise Certification 2018 Passed ISO14001, OHSAS18001, LA, GB/T27922 certificates 2020 Apply to enter the EU certification system, used FFP2, FFP3 anti parti... [Details] |