Top 20 Window Profile & System Mills in China (2026)

Entries are drawn from national enterprise registry business registry data cross-referenced with official-site product listings; no paid placement and no third-party 'Verified' claim is made. Every entry must show aluminum profile or system-profile evidence (profile-system window series count; retail finished-window assemblers are excluded editorially). Score blends category focus (40 pts: share of a supplier's verified catalogue that is window profile, log-adjusted so a single-product supplier cannot outrank a supplier with deeper window-profile evidence), export readiness (30 pts: English-language official site + additional language sites), and registered scale (30 pts: registered capital and years since founding, each percentile-ranked against the qualifying supplier pool). Missing fields score 0 on that dimension -- they are never inferred or treated as a negative signal. External-authority points (max 20) come only from verifiable public sources, each cited with its source URL; secondary-source reports earn half weight, unverifiable leads none. Absence of external signals is not penalized.

Fuentes citadas. National Enterprise Credit Information Publicity System · Official-site product evidence (reviewed) · cninfo / HKEX listings · MIIT public lists

Aviso: no es una posición pagada. Ninguna fábrica pagó por su inclusión ni por su posición en el ranking. Se revisa de nuevo annual.