Shanghai Weiwang Technology (上海威望科技), trading as WE WON, is a specialist firestop installer holding accreditation in UL’s Qualified Firestop Contractor Program under file R40773 — one of only two mainland Chinese contractors currently in UL’s RFTI category. The programme requires a Designated Responsible Individual, documented installation procedures and periodic UL field audits, which means an installed seal can be traced back to the specific UL 1479 or UL 2079 system detail. Its work concentrates on high-requirement industrial facilities: semiconductor fabrication plants, pharmaceutical plants and data centres, with point-level traceability records. It also supplies flood-mitigation door systems certified to FM Approvals 2510.