FDA Authorization/Lab Reports/Certificates
FDA Emergency Use Authorization for Guangzhou Nan Qi Xing. Scroll down to Appendix A (Non-NIOSH Approved Respirators) and search for the manufacturer ("Guangzhou Nan Qi")
Guangzhou Nan Qi Xing NIOSH NPPTL Lab Report
Filter Efficiency Report - U.S. Independent Lab (ICS Laboratories Inc)
Laboratory Report for GB2626-2006 (KN95)