Rogenilan’s official RGNL-75 Thermal Break System Folding Door page and the folding-door category identify a Foshan, Guangdong location. The named product publishes a 75 mm frame reference, 6063-T5 thermal-break aluminum, multiple glazing and finish options, LSM system hardware and several odd-panel opening layouts. Those facts belong to this series and must not be extended to another door.

Scenario use for further enquiry: a weather-exposed glazed opening where the buyer can send a complete panel map, threshold section and glass schedule. Require Rogenilan to state permitted sizes and panel weights, selected hardware, stack support, screen interface, report applicability, sample, packing and exclusions. Because Rogenilan publishes this guide, independently check its factory, entity, evidence and quotation just as closely as every competitor.

LEAWOD’s official aluminum folding-door page lists GZW78 aluminum and MZW90 wood-aluminum folding products and gives a Guanghan, Deyang, Sichuan address. Because those two material families differ, the buyer should not treat “folding door” as one comparable baseline.

Scenario use for further enquiry: openings where aluminum versus wood-aluminum construction is an explicit design decision. Ask for the exact model, material layers, sections, panel sequence, stack bay, glass, hardware, finish, sill and physical sample. If a project needs private labeling or a modification, classify it as packaging, standard-option selection, tooling or engineering, then identify ownership and report effects.

Xinling’s official product index lists several folding-door families, including 40/60/80 all-aluminum fully opening doors and 80(68) and 80 series thermal-break products. The same page gives a Weifang, Shandong factory address and a separate Qingdao office.

That range can support a useful configuration discussion, but the names alone do not establish common glass, hardware or evidence. For a high-use opening, ask which series is proposed, where it will be made, how panels are carried and guided, what inspection checks alignment and force, how stack and traffic leaves lock, and which replacement components will remain identifiable after handover.

YY publishes a dedicated aluminum folding-door page and a Pudong, Shanghai address. The page signals configurable folding panels and aluminum construction; its marketing claims should be replaced in an RFQ by the exact quoted model and primary evidence.

• Send the structural opening, finished opening, panel map and interior view.
• Ask for frame, panel, hinge, carrier, sill and drainage sections.
• Require the legal seller, producing site and tested-versus-offered comparison.
• Put alternative glass, hardware, finish and packing outside the base offer.

NorthTech’s official aluminum folding-door product page describes insulated and non-insulated panel options and configurable sizes, while its product navigation gives a Beijing address.

For a public opening, the next step is not accepting “adjustable panel number.” Ask NorthTech to return the maximum permitted panel, stack and total-frame geometry for the selected system; hardware codes and load basis; lead traffic leaf; threshold and drainage; safety treatment for glass; and the full document scope. Any cited certification must be matched to the offered assembly rather than the broader website.

Superhouse’s official bifold-door page shows an aluminum bifold range and states that the head office is in Shanghai and the factory in Qidong, Jiangsu. That split makes entity and production-site reconciliation part of the project brief.

Required verification: name the contracting entity and exact producing facility; return the chosen system, panel layout, threshold, glass and hardware bills; and provide the complete report record for any claimed approval. Confirm whether design review, calculations, sample, inspection access, package design, spares and site guidance are included or separate.

Finzone’s official folding-door page identifies the Shanghai company and a fold-back aluminum/glass door product; its site also presents frameless and sliding-folding terrace systems. This variety is relevant when a brief includes a glazed divider, but the system boundary must be explicit.

Ask whether the offered product is a hinged bifold, individually sliding-and-turning panel system, frameless enclosure or another configuration. Request a movement diagram, track and parking detail, glass retention and safety scope, weather boundary, locking, cleaning access, replacement parts and installation responsibility. Do not compare it to a conventional thermally broken exterior bifold until the project team accepts the functional differences.

Haoyue’s official site presents foldable glass doors within its aluminum door-and-window scope, while its contact page gives a Longhai District, Zhangzhou, Fujian address. These pages support shortlist relevance, not model selection or technical approval.

Project question: which named aluminum folding-door series, section drawing and hardware set will be quoted for the actual opening? Ask the supplier to identify the factory, material, glass build-up, panel sequence, top and bottom guidance, sill, seals, finish, size and weight limits, report schedule, sample and packaging. If it cannot return a controlled product definition, keep the enquiry at research stage.

Feilong’s official door-and-window product list names a Z70 aluminum hollow-glass folding door, and the same site gives a Yantai, Shandong address and the current company name.

The named series provides a clearer starting point than a generic folding-door claim. Buyers should still obtain the Z70 sections, panel and traffic-leaf arrangements, glass schedule, carrier and hinge codes, threshold, finish, allowed geometry and applicable evidence. Where the wider company offers engineering or installation, use a responsibility matrix so fabrication, glazing, anchors, perimeter sealing, site measurements and corrective work are contractually assigned.

Etaifeng’s official company site identifies its Shenyang, Liaoning base and lists folding doors within a wider system-window, system-door and facade portfolio. The public scope may be relevant where folding doors meet coordinated building-envelope work.

For an integrated project, define whether Etaifeng is quoting completed doors, a system package, engineering, installation or several of these. Assign each drawing, calculation, survey, profile, glass, hardware item, anchor, seal, factory inspection, package and site activity to a legal entity. The buyer should approve the system boundary and evidence before interpreting broad project capability as responsibility for the proposed opening.