Zhongding House
Flat-pack container houses, folding and bolt-together modular rooms, site cabins, expansion boxes and steel-frame sheds, sold under the ZHONGDING HOUSE brand. The registered company holds a grade-2 steel-structure contractor licence valid to December 2029, three ISO management-system certificates and third-party test reports on the container unit, the Q235B section steel and the sandwich panel. Its catalogue describes a four-plant group with 800 staff; the entity behind this listing carries twenty people on social insurance. Both are set out below, because the second one is what a contract is signed with.
Seven box types, one steel frame.
Flat-Pack Container Houses
The core line and the one with a test report behind it: the Jinan Institute of Product Quality Inspection report on file covers an assembled container house of 6055 × 2990 × 2896 mm. Flat-pack units ship knocked down and are bolted up on site, so the questions that decide cost are how many units fit a 40′ container, who assembles them, and what the wall and roof build-up actually is.
Folding Container Rooms
The folding series unfolds from a flat stack, which cuts freight further than a bolted flat-pack. Ask for the folded and erected dimensions, the number of units per container, how many fold cycles the hinges are rated for, and whether the erected unit reaches the same wind load as the bolted one.
Quick-Splice Modular Rooms
Bolt-together rooms aimed at fast site set-up. The catalogue states more than a hundred sets a day across the group for the flat-pack and quick-splice lines together. Ask which plant that figure belongs to and what one set contains.
Site Cabins & Movable Houses (K-Type)
The movable-house line — the classic K-type site accommodation — with a stated group output of 5,000 m² a day. These are sold heavily to Chinese state construction groups domestically; for export, ask what changes for your country’s wind, snow and seismic requirements.
Steel-Frame Sheds & Main Structures
Portal-frame sheds and main steel structures, the work the grade-2 contractor licence covers. For a building rather than a box, ask which design code the structure is calculated to and whether a local engineer will need to re-certify it.
Expansion Boxes & Feature Units
Expansion boxes that open out to a larger footprint, and the “online-red” feature units aimed at retail, pop-ups and catering. Photographs are in the catalogue; no drawings or specifications were supplied.
Materials — the Part to Pin Down
Two of the three test reports are about materials rather than the finished box: Q235B section steel, and a metal-faced insulated sandwich panel tested to GB/T 23932-2009. Those are the right documents to ask for — but ask for the ones matching the panel core and thickness in your quotation, because fire performance follows the core.
What Has Not Been Supplied
No per-model specification sheet, no wind or snow load table, no structural calculation, no drawings, and no fire classification for the panel to a European, American or Gulf standard. The website printed in the catalogue (www.wfzhongding.cn) was not reviewed for this listing.
What the registry confirms, and what stays open.
The Group and the Entity Are Not the Same Thing
This is the single most important line on the page. The catalogue describes a group with four production bases, 800+ staff, 80,000 m² and an annual output value of RMB 100 million. It also names two of those bases as separate companies: the flat-pack base is 昌乐鼎盛钢结构工程有限公司 (Changle Dingsheng Steel Structure Engineering Co., Ltd.) — that is the name on the gate sign in the catalogue’s own photograph — and the Guangdong base is described as the Bairui integrated-house branch. The entity behind this listing, the one whose licence and ISO certificates are shown here, carries 20 people on social insurance. Neither figure is wrong; they describe different things. Ask which entity signs, builds and invoices before anything else.
Manufacturing and Export Are Both in Scope
The registry read (2026-09-29, official source) gives the scope as 加工、销售：钢架结构、复合板、彩钢单瓦 (processing and sale of steel frame structures, composite panels and single-layer colour steel sheet), the sale and installation of colour-steel canopies and colour-steel houses, the sale of steel, steel-structure engineering construction, and 货物进出口、技术进出口 (import and export of goods and technology). Both a manufacturing clause and an import/export clause are present — the second is less common on this platform than you would think.
Grade-2 Contractor Licence, Checkable Online
Certificate D237285358, steel-structure engineering specialist contractor, grade 2, valid to 17 December 2029, issued by the Shandong provincial housing and construction department. The note on the certificate records the upgrade from grade 3 on 12 October 2024, with the original grade-3 issue dated 9 December 2020. This one is verifiable without asking the company: the national construction-market portal at jzsc.mohurd.gov.cn publishes licence holders.
Twenty Insured Staff, RMB 500,000 Paid In
Registered capital is RMB 10 million and RMB 500,000 is recorded as paid in. Social insurance is recorded for 20 people at this entity. Against a group narrative of 800 staff, these two numbers are what a buyer’s credit check will surface, so they are printed here rather than left for later.
Four Environmental Penalties on Record
The risk read on 2026-09-29 returns four environmental-protection penalty items under own risk, plus one historical administrative penalty. The register does not return the subject or the amounts. Colour-steel and steel fabrication involve coating and welding, so environmental enforcement is not unusual in this trade — but four items is a number worth asking about. Request the decision documents if the matter bears on your order.
Court Records: Mostly as Claimant
Two judgment documents and one hearing announcement sit under own risk: one sales-contract dispute the company brought against a buyer, and one case in which it was named. One historical hearing announcement is also a case it brought. No abnormal-operations listing and no person-subject-to-enforcement record were returned.
What was checked — and what the check found.
Two kinds of evidence sit behind this page and they are kept apart. The registry read — status, scope, capital, paid-in capital, insured headcount, address and the full risk scan, including the four environmental penalties — comes from an official registry source read on 2026-09-29 and is quoted as recorded. The certificates and test reports were supplied by the company as copies and read page by page on 2026-09-29; ChinaMakersHub has not looked their numbers up with the issuing bodies, with one exception a buyer can do for themselves: the contractor licence is published on the national construction-market portal. Everything else — plant count, staff numbers, daily output, project count and the group narrative — comes from the company’s own catalogue and is unverified.
A Weifang steel-structure maker, read off the register and the brochure together.
Zhongding House is the brand of 潍坊市中鼎钢结构有限公司 (Weifang Zhongding Steel Structure Co., Ltd. on its own brochure and ISO certificates), registered on 11 January 2010 in Weicheng District, Weifang, Shandong, with registered capital of RMB 10 million of which RMB 500,000 is recorded as paid in. An official registry read on 2026-09-29 confirms active status and a scope covering the processing and sale of steel frame structures, composite panels and colour steel sheet, colour-steel houses and canopies, steel-structure engineering construction, and the import and export of goods and technology.
The documents are better than most listings on this platform. A grade-2 steel-structure specialist contractor licence (D237285358) runs to 17 December 2029 and is publicly checkable on the national construction-market portal; a safety production licence, ISO 9001, ISO 14001 and ISO 45001 certificates in the company’s own English name, and three third-party test reports — on an assembled container house, on Q235B C-section steel and on a metal-faced insulated sandwich panel to GB/T 23932-2009 — were all read page by page.
What needs care is the difference between the group and the entity. The catalogue describes four production bases, more than 800 staff, 80,000 m² and an annual output value of RMB 100 million, and names two of those bases as separate companies — Changle Dingsheng Steel Structure Engineering Co., Ltd. for flat-pack, and a Bairui integrated-house branch in Guangdong. This entity carries 20 people on social insurance. The register also returns four environmental-protection penalties and one historical administrative penalty. And the catalogue still describes the contractor licence as grade 3, two years after it was upgraded to grade 2 — a reminder that the brochure is not the record. Ask which entity signs and builds, ask for the test reports matching your own panel build-up, and ask for a fire classification to the standard your market accepts.
Registered 2010, three founding years in circulation.
Founding year is inconsistent
The business licence records incorporation on 11 January 2010. The catalogue says the company “was founded in 2006, formerly Weifang Wanda colour steel plate factory” and, in the same paragraph, that it “was officially established in 2001”. All three are printed here; the licence is the one that governs.
Grade-3 contractor licence
Steel-structure specialist contractor grade 3 first issued on 9 December 2020 (recorded on the current certificate).
Upgraded to grade 2
Upgraded from grade 3 to grade 2 on 12 October 2024; the certificate now runs to 17 December 2029.
Registry read · joins CMH
Listed from a 22-page credentials pack and a 38-page bilingual catalogue supplied by the company, plus an official registry read on 2026-09-29. Per-model specifications, load tables and fire classifications remain open.
Where these buildings get put up.
Construction Site Accommodation
Site cabins and K-type dormitories — the domestic volume business.
Labour Camps & Remote Projects
Flat-pack and folding units for mining, energy and infrastructure camps.
Emergency & Resettlement Housing
Modular hospitals and municipal resettlement rooms, named in the catalogue.
Retail, Pop-Up & Catering
Expansion boxes and feature units for kiosks, cafés and event builds.
Warehousing & Light Industrial
Portal-frame steel sheds under the grade-2 contractor licence.
Contractors & Distributors Abroad
Container-load supply to a local contractor who erects and certifies on site.
Sourcing guides for this category
What Documents to Request From a Chinese Supplier Before Your First Order
Importing from China: The Compliance Checklist by Market
How to Write a Product Spec Sheet for a Chinese Factory
Product Inspection in China Before Shipment: A Buyer's Guide
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Frequently Asked Questions
What does Zhongding build?
Flat-pack container houses, folding container rooms, quick-splice modular rooms, K-type site cabins, expansion boxes, feature retail units and steel-frame sheds, under the brand ZHONGDING HOUSE. Its registered scope covers the processing and sale of steel frame structures, composite panels and colour steel sheet, steel-structure construction, and import and export.
Is this listing CMH-verified?
Yes, on the registry check and the documents sighted: an official read on 2026-09-29 confirms active status since 2010, manufacturing and import/export in scope; copies of a grade-2 contractor licence, a safety production licence, three ISO certificates and three third-party test reports were read page by page. It does not confirm the group’s plant count, staffing or output figures, and it does not confirm any overseas approval.
Eight hundred staff or twenty?
Both, describing different things. The catalogue describes a group of four plants with 800+ people; the registry records 20 on social insurance at this company. At least two of the four bases are separate legal entities — the flat-pack base is Changle Dingsheng Steel Structure Engineering Co., Ltd. and the Guangdong base is described as the Bairui branch. Ask which entity will sign your contract, which will build, and which will invoice; they may not be the same one.
The catalogue says the company was founded in 2006 and also in 2001. Which is right?
Neither is the incorporation date. The business licence records 11 January 2010, and the registry read agrees. The 2006 and 2001 dates appear in the company’s own profile paragraph, which also names a predecessor colour-steel plate factory. Predecessor businesses are common and unremarkable; use the licence date and the credit code on documents.
What about the environmental penalties?
The risk scan returns four environmental-protection penalty items against this company, without subject or amount, plus one historical administrative penalty. They are printed because they exist. Coating and welding lines attract environmental enforcement in this trade; if it bears on your order, ask the company for the decision documents and for what changed afterwards.
Does the company have a plant in Saudi Arabia?
It was mentioned verbally when the company was introduced to ChinaMakersHub, and nothing in the 60 pages of documents supplied refers to it. It is recorded here as an unverified statement and nothing on this page depends on it. If a Gulf-based plant matters to your project, ask for the registration documents of that entity and for its relationship to this one, before you plan around it.
What does a modular building need to be sold into Europe?
Two things usually, and they are separate. The structural steelwork falls under the harmonised standard EN 1090-1, which requires the fabricator to hold factory production control certification and to CE-mark the structural components, with execution to EN 1090-2 and an execution class agreed with the designer. The building envelope is a different question: metal-faced insulated sandwich panels are covered by EN 14509, and the reaction-to-fire classification is expressed under EN 13501-1 (the Euroclass system). The company’s panel report on file is to the Chinese standard GB/T 23932-2009, which is not an EN classification. Whether your specific project also needs structural calculations re-certified by a local engineer was not confirmed when this page was written (September 2026) — ask your building-control authority.
And for the United States, Australia or the Gulf?
In the United States, factory-built modular units are regulated state by state, and most states operate a modular programme requiring third-party plan review and in-plant inspection before the unit ships; steel fabrication is separately governed by AISC standards. Australia works to the National Construction Code with wind classification to AS 4055 and AS/NZS 1170.2. The Gulf states apply their own building codes, and Saudi Arabia operates the Saudi Building Code with SASO product requirements. None of these routes was confirmed for this company’s products when this page was written — confirm with the authority having jurisdiction before you order.
Which panel core should I specify?
It decides the fire performance, and it is the one line buyers most often leave to the supplier. Rock wool gives the best reaction-to-fire behaviour and the highest weight and cost; EPS is the cheapest and the worst on fire; PU/PIR sits between. Ask for the core material, the density, the panel thickness and the facing steel thickness in writing, and ask for a fire test report to the standard your market accepts, on the same build-up you are quoted — not on a different one.
Which HS code usually applies?
Prefabricated buildings are classified in HS heading 9406, with subheading 9406.90 for those of other materials including steel. Steel structures and parts supplied separately fall in heading 7308. Which applies to a flat-pack unit depends on how complete it ships; national tariff lines differ and classification is decided by customs at import. Confirm with your broker before shipping.
Talk to Zhongding House directly.
Send the unit size and layout, how many units and where they ship, the wind and snow loads the site has to meet, the steel grade and section sizes you expect, and the sandwich-panel core — rock wool, EPS, PU or glass wool — with the fire class your market requires. Ask in the same message which of the group’s plants will build the order and which legal entity signs the contract and issues the invoice; the catalogue names four plants and at least two of them are separate companies. Ask for the test reports that match the panel you are quoted, not the ones in the brochure. ChinaMakersHub will route the request.