Standard: Environmental management system certification Number: 00218E32534R4M Issue Date: 2018-08-28 Expiry Date: 2038-08-28 Scope/Range: Sewage treatment Issued By: Fangyuan Certification Group

Standard: Occupational Health and Safety Management Certification Certificate Number: 00218S11961R4M Issue Date: 2018-08-28 Expiry Date: 2021-09-09 Scope/Range: Sewage treatment Issued By: Fangyuan Certification Group

Standard: Quality management system certification Number: 00218Q25177R4M Issue Date: 2018-08-28 Expiry Date: 2021-09-09 Scope/Range: Sewage treatment Issued By: Fangyuan Certification Group

Standard: Utility model patent certificate Number: 1926535 Issue Date: 2011-09-01 Expiry Date: 2031-09-01 Scope/Range: Fixed square plate filter Issued By: State Intellectual Property Office of the P.R.C

Standard: Utility model patent certificate Number: 1927640 Issue Date: 2011-09-07 Expiry Date: 2031-09-01 Scope/Range: Fixed disc filter Issued By: State Intellectual Property Office of the P.R.C

Standard: Utility model patent certificate Number: 1928814 Issue Date: 2011-09-07 Expiry Date: 2031-09-07 Scope/Range: Fine filter Issued By: State Intellectual Property Office of the P.R.C

Standard: Utility model patent certificate Number: 6022569 Issue Date: 2017-03-29 Expiry Date: 2027-03-29 Scope/Range: Side guard Issued By: State Intellectual Property Office of the P.R.C

Standard: Utility model patent certificate Number: 6023794 Issue Date: 2017-03-29 Expiry Date: 2027-03-29 Scope/Range: Sewage filtration dosing device Issued By: State Intellectual Property Office of the P.R.C

Standard: Environmental management system certification Number: 00218E32534R4M Issue Date: 2018-08-28 Expiry Date: 2038-08-28 Scope/Range: Sewage treatment Issued By: Fangyuan Certification Group

Standard: Occupational Health and Safety Management Certification Certificate Number: 00218S11961R4M Issue Date: 2018-08-28 Expiry Date: 2021-09-09 Scope/Range: Sewage treatment Issued By: Fangyuan Certification Group

Standard: Quality management system certification Number: 00218Q25177R4M Issue Date: 2018-08-28 Expiry Date: 2021-09-09 Scope/Range: Sewage treatment Issued By: Fangyuan Certification Group