| Class I(Filing/Recordation (备案) — no review, no fee) Zero days is the published position, not an estimate: the NMPA service item classifies the filing as an 即办件 and states that where the materials are complete and in the required form the filing is made 当场 — on the spot — against a sealed 备案凭证 Regulation No. 739 art. 15 completes the filing on submission of conforming materials and obliges the authority to publish the filing within 5 working days of receipt, which is a publication duty rather than a review period Deficient materials draw a single consolidated notice of everything needing correction, so the elapsed time in practice is dossier preparation under Announcement No. 62 of 2022, which is what the realistic range measures No fee, and no expiry; filed with the municipal authority for a domestic device and with NMPA for an imported one, through a designated Chinese legal person |