| 1 | High-volume steel post producer | North China | T-posts, U-posts, Y-posts | Low-carbon steel | 1.2–2.4 m; 1.25–3.0 kg/m | Hot-dip galvanizing or powder coating | 1–5 metric tons | 20–35 days | ASTM A702, ASTM A123, ISO 1461 |
| 2 | Welded tubular post producer | East China | Round, square, and rectangular hollow posts | Carbon steel and galvanized steel | 38–114 mm diameter; 1.5–3.5 m | Zinc coating, zinc-rich primer, or powder coating | 100–300 pieces | 25–40 days | ASTM A500, EN 10219, ISO 1461 |
| 3 | Roll-formed agricultural post producer | Central China | C-channel, U-channel, and vineyard posts | Galvanized sheet steel | 30–80 mm profile width; 1.5–2.8 m | Pre-galvanized coating, commonly Z180–Z275 | 2–10 metric tons | 20–35 days | ASTM A653, EN 10346, ISO 1461 |
| 4 | Heavy-duty security post producer | North China | Security fence posts and anti-climb system posts | Structural carbon steel | 60–120 mm diameter; 2.0–4.0 m | Hot-dip galvanizing, polyester powder coating | 100–500 pieces | 30–45 days | EN 10210, EN 10219, ISO 1461 |
| 5 | Stainless-steel post producer | East China | Architectural, coastal, and hygienic fencing posts | 304 or 316 stainless steel | 38–100 mm diameter; 0.8–3.0 m | Mill finish, brushed finish, or electropolishing | 50–200 pieces | 30–50 days | ASTM A240, ASTM A554, EN 10088 |
| 6 | PVC and composite post producer | South China | Vinyl, PVC-coated, and composite posts | uPVC, HDPE, fiberglass, and recycled composite | 50–150 mm profile width; 1.2–3.0 m | UV stabilizers, colored polymer, or co-extrusion | 300–1,000 pieces | 25–45 days | ASTM F964, ASTM D1784, EN 15534 |
| 7 | Agricultural and livestock post producer | Northwest China | Welded wire, cattle, sheep, and electric-fence posts | Steel, fiberglass, and reinforced polymer | 0.8–2.2 m; 8–25 mm diameter | Galvanizing, enamel coating, or UV-resistant polymer | 500–2,000 pieces | 20–35 days | ASTM A641, ASTM F1043, EN 10244 |
| 8 | Decorative and residential post producer | South China | Picket, garden, ornamental, and gate posts | Mild steel, aluminum, and cast aluminum | 25–100 mm profile width; 0.6–2.4 m | Powder coating, anodizing, or liquid paint | 100–500 pieces | 25–45 days | ASTM B221, AAMA 2603–2605, ISO 12944 |
| 9 | Concrete and precast post producer | Central and Southwest China | Precast concrete, utility, and agricultural posts | Reinforced concrete and prestressed concrete | 80–150 mm width; 1.8–3.0 m | Dense concrete cover and weather-resistant admixtures | 100–500 pieces | 30–60 days | ASTM C94, ASTM C150, EN 206 |
| 10 | Custom OEM fence post producer | Multiple Chinese industrial regions | Project-specific posts, brackets, sleeves, and complete systems | Steel, stainless steel, aluminum, and composite materials | Custom drawings; commonly 0.6–4.0 m | Galvanizing, powder coating, anodizing, or multi-layer systems | 100–1,000 pieces | 35–60 days | Project specification, ASTM, EN, ISO, or local code |