The water plant supervision meeting
The water plant supervision meeting was not held in the meeting room this time.The main structure has been completed, so…
Read more →Independent technical inspection & consulting services, led by Yang Jia — a Registered Supervision Engineer (注册监理工程师) with 19 years of MEP and construction experience. We verify quality at the source — so your goods meet spec before they leave China.
Every engagement is built on three client commitments: compliance — your goods and materials meet the specifications and standards your market requires; verified quality — what you ordered is what you receive; and value for money — no inflated costs, no hidden markups on supplier quotes. To deliver on these commitments without compromise, we operate under one non-negotiable principle: strict independence. We are engaged by the client, paid by the client, and accountable only to the client. All services are open to both business and individual clients — no minimum order volume required.
We visit your factory or supplier’s site, measure and verify against your technical specifications, and deliver a bilingual evidence report within 24 hours.
Electrical cables, conduit & switchgear · Plumbing pipes, valves & fittings · HVAC equipment & ductwork — covering dimensional checks, material grade, insulation, pressure test witnessing, and export certification labels (CE / UL / AS)
Stone & tile slab sorting · Steel weld & paint film check · Aluminium profile thickness · Lab coordination
Board environmental grade · Edge-banding & hardware · 1:1 pre-assembly trial · Dimension vs. drawing cross-check
Inspect during production or at finished-goods stage — catch defects before they reach the container.
📌 Inspection scope and acceptance criteria are defined by the client. Whether to accept or reject goods is the client’s sole decision.
Request Inspection →We locate and assess qualified suppliers in China. You retain full control of negotiation, pricing, and purchasing. We charge a fixed service fee — nothing more.
Shortlist factories that match your product category, production capacity, and quality level
Convert your English drawings and specifications into a factory-ready Chinese technical brief
On-site review of equipment, QC process, and workforce before you commit to an order
Shipment via our Guangzhou company or direct by the factory — your choice. VAT invoice issued.
📌 Price negotiation and purchasing decisions remain entirely with the client. We do not take trade margins or supplier commissions.
Enquire →Written technical reviews prepared by our engineer — for disputes, warranty claims, or pre-purchase risk assessment. 🌎 Fully remote, no factory visit.
Independent technical opinion on whether goods meet contracted spec — evidence for negotiation, rejection, or legal proceedings
Written assessment of a proposed purchase: supplier risk, specification gaps, and recommended inspection points
On-site survey of delivered or installed materials — document defects with measured evidence during defect liability period
Review supplier’s quality certificates, test reports, and material datasheets against your project requirements
📌 Prepared by Yang Jia (Registered Supervision Engineer, PRC), issued by our company as technical consulting — not a statutory opinion.
Discuss Your Case →📌 Where a statutory inspection, mandatory certification, or a court- or insurer-recognised expert determination is required, we will say so and point you to the right body — we do not issue documents we are not authorised to issue.
Select a service to see the exact steps — from first contact to final deliverable.
Client shares purchase order, technical specifications, or drawings. Describe which stage of production or which goods are to be inspected. We confirm the engagement and open an inspection reference.
Agree on the specific checkpoints, applicable standards (GB / ISO / CE / client spec), and pass/fail criteria in writing before any fieldwork begins.
Engineer visits the factory or warehouse. Physical measurements, material and workmanship checks, real-time photo & video documentation against confirmed checkpoints.
Preliminary findings shared with the client during the visit — no surprises at report stage.
Bilingual PDF (EN / 中文) with photographs, measured data, and pass/fail conclusions. Delivered within 24 hours of inspection completion.
If defects are found, we liaise with the supplier on the client’s behalf and re-inspect after corrective action is completed.
Client shares purchase order, technical specifications, and production schedule. We confirm scope, define inspection nodes, and open a project file.
Agree on applicable technical standards and confirm acceptance criteria in writing for each inspection node before any fieldwork begins.
Verify raw materials, components, or semi-finished goods before production begins — reject non-conforming inputs at the earliest possible stage.
On-site checks at critical production milestones. Physical measurements, workmanship assessment, and photo & video documentation in real time.
Finished goods inspection before packing — dimensions, appearance, quantity count, and compliance against purchase order and client specifications.
Witness and document the loading process: verify goods loaded match the approved batch, confirm packing condition, and record container seal number.
Consolidated bilingual report covering all inspection nodes — with photographs, measured data, and pass/fail conclusions for the full production cycle.
If non-conformances are identified at any stage, we coordinate with the supplier and re-inspect after corrective action is completed.
Share product requirements, technical specifications, and target delivery schedule. We confirm scope and open a project file.
Agree on product standards, quality benchmarks, and evaluation criteria before sourcing begins.
We identify qualified manufacturers matching your requirements. Standard materials: minimum 3 candidates. Specialised or custom items: number as agreed with client.
Supplier profiles delivered with capability overview, available certifications, and factory location. Client reviews and selects preferred supplier.
Price negotiation, contract terms, and purchasing are the client’s sole decision. We do not participate in commercial terms or take any trade margin.
Verify raw materials or components before production begins — reject non-conforming inputs before they enter the production process.
On-site checks at critical production milestones. Physical measurements, workmanship assessment, and real-time photo & video documentation.
Finished goods inspection before packing — dimensions, appearance, quantity count, and compliance against purchase order and specifications.
Witness the loading process: verify goods loaded match the approved batch, confirm packing condition, and record container seal number.
Consolidated bilingual report covering all inspection nodes from incoming material through container loading — full audit trail for the entire procurement cycle.
Describe your situation and attach relevant documents — contracts, supplier correspondence, inspection photos, test certificates, or drawings.
We assess feasibility and confirm engagement scope, timeline, and a fixed fee within one business day.
Systematic technical review of all supplied materials against applicable standards, contractual requirements, and industry norms.
On-site visit for defect surveys, condition assessments, or direct evidence collection where physical inspection is necessary to form a complete opinion.
Preliminary findings shared with client to verify factual accuracy. Client may correct factual errors; the professional opinion and conclusions are Yang Jia’s independent judgement and are not subject to client editing.
Technical review report — prepared by our engineer, issued by our company. Intended for your negotiation with the supplier, to document a rejection, or to support a warranty claim through your own advisers.
Unlike general QC agents, we interpret technical drawings, understand tolerances, and inspect to your actual specification — not a generic checklist.
Yang Jia personally holds a Registered Supervision Engineer licence (注册监理工程师) — a national professional licence issued by China’s MOHURD. Every inspection is led by this credentialled engineer, not delegated to junior staff.
19 years of on-site project experience across structural works, MEP systems (plumbing & drainage, electrical, fire protection, HVAC, building automation & BMS, elevators, and more), interior fit-out, curtain wall, and specialist kitchen works — builds an exceptionally deep foundation in material and equipment acceptance. We verify the quality of your purchased materials and equipment at source, before they reach the project site, helping you avoid serious quality failures down the line.
Our Guangzhou company issues proper VAT invoices, signs enforceable service contracts, and handles foreign-exchange settlements — protecting your financial records.
Every report includes measured data, calibrated instrument readings, and timestamped photos. Use it to negotiate, reject, or claim warranty in any jurisdiction.
Based in Guangzhou — we reach Foshan, Dongguan, Zhongshan, Shenzhen, and all major Pearl River Delta manufacturing hubs. Most inspections can be scheduled within one business day of booking.
Not sure if a Chinese standard (GB mandatory or GB/T recommended) meets your EN, ISO, IEC, or ASTM requirement? Our free AI tool delivers a dual-verified technical comparison in under 3 minutes — covering MEP systems, building materials, electrical, and more.
| Parameter | GB/T 5023 | IEC 60227 |
|---|---|---|
| Equivalence | MOD | Base standard |
| Conductor temp. | 70··C | 70··C |
| Test voltage | 2000 V / 5 min | 2000 V / 5 min |
Every engagement starts with a written fee confirmation — no hidden costs, no surprise invoices, no commission from suppliers. Rates are grouped by how the work is delivered: on-site and supplier work quoted per scope, and remote desk reviews at fixed fees. The exact fee is confirmed in writing before any work begins.
On-site & supplier work — scope confirmed in writing
One-day factory or warehouse visit. Scope and acceptance criteria confirmed in writing before engagement. Bilingual report within 24 h.
Incoming material → in-process → pre-shipment → container loading supervision. Full bilingual audit trail for the entire procurement cycle.
Supplier identification, on-site capability audit, and technical spec translation. Fixed service fee — no trade margin taken.
Desk reviews — remote, fixed fee, no site visit
Use it before you compare quotations. Send us the certificate, test report, or datasheet your supplier gave you, and we check what it actually covers — product type, model, and destination market — and what it does not.
Use it when a claim or dispute is already live. Written technical opinion for dispute resolution, risk assessment, or defect documentation. Fully remote — no site visit required.
Use it before you place the order. Two or three quotations compared on one specification basis: where the specifications differ, what is missing, and which questions to send back to the supplier.
Use it before you commit to a supplier or an order. Pre-order due diligence on the whole package rather than one document: supplier certificates and test reports reviewed against your destination market, quotations compared, and the order and payment structure checked — with a written action list.
📌 All fees are confirmed in writing before engagement begins. There are no hourly charges and no add-ons. Re-inspection, if required after corrective action, is quoted separately.
💳 Payment — every engagement is quoted and issued as a Proforma Invoice (PI) in USD, with the fixed fee stated on it. You can pay the PI by PayPal (card or PayPal balance) or by bank transfer (T/T); our USD bank details are printed on the PI. For smaller engagements PayPal is the faster route — no wire fee, no 3–5 day wait. The PI is due on receipt, and work starts once the payment clears.
Registered Supervision Engineer · Chief Resident Engineer
With over 19 years of hands-on MEP engineering and construction quality experience — spanning large-scale commercial and residential projects across the Greater Bay Area — Yang Jia brings specialist technical knowledge that goes far beyond what a standard third-party inspection agency can offer.
As a former Chief Resident Engineer (总监理工程师), Yang has led multi-disciplinary supervision teams on projects exceeding 100,000 m² — giving him a first-hand, systemic understanding of where quality failures originate and how to prevent them at the source.
Yang Jia operates through Guangzhou Yishijiu Information Technology Co., Ltd. as an independent technical consultant — enabling flexible, client-focused engagements with full commercial formality: official VAT invoices, enforceable contracts, and foreign-exchange settlement support. His Registered Supervision Engineer licence is a nationally recognised credential issued by China’s MOHURD, and the professional foundation for every report he signs.
Yang Jia holds national-level professional licences issued by the Chinese government — providing the legal foundation and technical authority for every engagement.
China's national professional licence for construction supervision, issued by MOHURD. Requires passing the national unified examination (jointly administered by MOHURD and the Ministry of Human Resources and Social Security) followed by formal registration. Registered specialties: Building Construction Engineering · Electrical Engineering. Licence is publicly verifiable on the official MOHURD registry by searching the holder's name.
✓ Verify Official Record →Professional engineering title in Construction Engineering, recognised nationally. Awarded through evaluation of technical competency and work performance. Verifiable via the Hunan Provincial Human Resources and Social Security online platform.
✓ Verify Official Record →Inspection updates, factory case studies, and technical insights — direct from the ground in China.
The water plant supervision meeting was not held in the meeting room this time.The main structure has been completed, so…
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In construction procurement, the most critical quality control happens during concealed works. In this site journal, engineer Yang Jia reviews the pre-covering technical witness audit of an outdoor drainage infrastructure project, enforcing strict design blueprint compliance on concrete bedding and structural backfilling.
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Real quality control happens on the floor. In this site inspection journal, engineer Yang Jia shares the on-site witness data of a concrete pavement core drilling test, demonstrating how CN Quality Check physically enforces blueprint specifications and dimensional tolerances with zero deviations.
Read more →Tell us what you need. We’ll confirm feasibility, timeline, and a fixed fee within one business day.