Martin Wang
Founder & Sourcing Engineer · China Sourcing Agent
Martin is the founder of Sky Flux and runs China Sourcing Agents, its electronics sourcing product line. He spent 7+ years as a hardware and full-stack engineer — building IoT devices and a port-management system — before moving full-time into sourcing.
That background is the whole point of the business. Most sourcing agents in China can’t read a schematic or tell a real factory from a trader reselling someone else’s catalogue. Martin reviews PCB layouts and BOMs, checks firmware and tooling feasibility, audits factories on-site in Shenzhen, Dongguan, and Yiwu, and inspects every shipment in three stages.
He writes the guides and articles on this site to help Western and Japanese hardware teams source from China without the surprises — covering factory audits, FCC/CE/UKCA certification, payment terms, and the trade-offs nobody tells you about until the first batch ships.
Guides (31)
Alibaba vs 1688 for Electronics: Which Source to Use
The real differences between Alibaba, 1688, and going direct to factory — pricing, trust, negotiation tactics, and when to use each.
FCC and CE Certification for Electronics from China
Verify FCC and CE certificates from Chinese suppliers, find accredited labs in Shenzhen, and write purchase orders that ensure you own the certification.
China Electronics Industry 2026: What Importers Need to Know
An overview of China's electronics sector — scale, geography, product categories, and what importers need to know about the supply chain in 2026.
China Electronics Manufacturing Companies: A Buyer's Guide
A practical guide to finding legitimate China electronics manufacturers — not traders — for hardware buyers and electronics importers.
China Electronics Market Cities: Where to Source What
A practical guide to China's electronics manufacturing cities — Shenzhen, Dongguan, Yiwu, and Suzhou — and when to source from each.
China Electronics Market Websites
A comparison of China electronics sourcing platforms — what each is for, who uses them, and how to avoid the common mistakes on each.
China Electronics Wholesale Guide
How to buy electronics wholesale from China: MOQ negotiation, pricing structures, payment terms, and the traps that cost buyers thousands.
China Market Entry for Electronics and Hardware Buyers
How to enter the Chinese electronics supply chain: supplier selection, factory audits, compliance, and first-shipment strategy for hardware buyers.
China Payment Terms: T/T, LC, Escrow
A practical breakdown of the payment terms used in China sourcing — Telegraphic Transfer, Letters of Credit, escrow, and when each one protects you.
Electronics Quality Control in China: An Engineer's Approach
QC for electronics goes beyond AQL sampling — component substitution, counterfeit parts, and firmware integrity require engineering-level review.
China Factory Audit Checklist
A practical checklist for auditing Chinese electronics factories. What to check, why it matters, and what disqualifying failures look like.
GaN Charger OEM China: Sourcing Guide
How to source GaN chargers from China — UL 62368-1 certification, GaN IC authenticity, DOE Level VI efficiency, and multi-market CE/UKCA/PSE compliance.
Hardware Startup Manufacturing in China: A Founder's Guide
What happens after crowdfunding succeeds — a sourcing agent's breakdown of every production milestone from prototype to 5,000+ units.
Choosing a China Sourcing Agent to Avoid Tariff Risks
US-China tariffs hit 35% for most electronics in 2026. Seven criteria for vetting whether your sourcing agent can navigate the new tariff landscape.
How to Source Electronics from China
Factory discovery to production management: the engineer-written guide to sourcing electronics from China for hardware startups and buyers.
How to Verify a Chinese Factory Before Wiring Any Money
Five verification levels that separate real factories from trading companies and scams — with specific checks you can do before spending a dollar.
Import Electronics from China to EU: CE, Customs & VAT 2026
A practical guide to importing electronics from China to the EU — CE marking under RED, customs duty rates, VAT on import, and CBAM considerations.
Import Electronics from China to UK: UKCA & Customs 2026
A practical guide to importing electronics from China to the UK — UKCA marking, UK Global Tariff rates, import VAT, and customs clearance post-Brexit.
Import Electronics from China to USA: 2026 Tariff Guide
A practical guide to importing electronics from China to the US — Section 301 tariffs, FCC requirements, customs clearance, and landed cost calculation.
Industrial IoT Hardware Sourcing from China
How to source IIoT hardware from China — industrial gateways, DIN rail devices, Modbus converters. Covers IEC compliance and -40°C component validation.
Multi-Market Electronics Certification: FCC, CE, UKCA & PSE
Certify electronics for the US, EU, UK, and Japan simultaneously — which tests transfer, what runs in parallel, realistic timelines from China.
OEM vs ODM Electronics China: Which Model to Choose
OEM and ODM mean different things for IoT sensors, gadgets, and industrial hardware. A product-category decision framework with real cost trade-offs.
PCB Assembly in China: Buyer's Guide
How to source PCB assembly from China — choosing factories, reading Gerbers, understanding IPC standards, and running quality inspection.
Power Transformer Manufacturers in China
How to source power transformers from China — top manufacturers, IEC 60076 standards, factory qualification, pricing, and lead times.
SASO and SABER Certification for China Electronics: How It Works
How SASO and SABER certification works via FASAH: who applies, the IEC test reports factories must provide, costs, and a realistic timeline.
Shenzhen Electronics Market: Huaqiangbei, Bao'an & Longgang
A buyer's guide to Shenzhen's electronics districts: source components, find factories, and evaluate suppliers in Huaqiangbei, Bao'an, and Longgang.
How to Source Smart Home Devices: Zigbee, Matter & Thread
A buyer's guide to sourcing Zigbee, Matter, and Thread smart home hardware from China: CSA certification, multi-protocol testing, and factory selection.
Sourcing Solar & Smart LED from China: CE & RoHS
CE and RoHS compliance for EU buyers sourcing solar panels, LED fixtures, and smart LED products from China. Directives, standards, costs, red flags.
Sourcing Smart Home Devices for Saudi Arabia: A China Buyer's Guide
Source smart home devices from China for the Saudi market: SASO/SABER, Type G plugs, 220V/60Hz, Arabic manuals, and CST radio approval — without surprises.
Top Chinese OEM Electronics Manufacturers for Private Label
A buyer's guide to the actual Chinese electronics manufacturers that make products for Western brands — not the consumer brands you know.
Wearable Device Manufacturer China: A Sourcing Guide
How to manufacture wearables in China — factory selection, FPC sourcing, battery certification (UN 38.3, IEC 62133-2), and FCC/CE/UKCA compliance.
Blog Posts (34)
Air Fryer Private Label: Multi-Function Upgrade Strategy
Portable air fryer searches grew +1,017% YoY. Here's how Amazon sellers and distributors source differentiated units from Chinese OEM factories.
Alibaba vs 1688 vs Direct Factory: Which Should You Use?
How Alibaba, 1688, and direct factory sourcing actually differ — and which one makes sense depending on where you are in your product journey.
Amazon FBA Electronics from China: What Sourcing Agents Do
How sourcing agents help Amazon FBA electronics sellers: certifications, MOQ negotiation, inspection, and avoiding the most common mistakes.
BLE Module Sourcing: nRF52840 vs ESP32 Compared
nRF52840 vs ESP32 BLE modules from China: certification costs, supply chain risks, and what to verify when auditing a BLE module factory.
Canton Fair 2026: A Buyer's Guide for Electronics
Canton Fair 2026: which phase covers electronics, how to register, and how to use the fair to find real suppliers — not just walk booths.
Searching and Sourcing Alternative Electronic Components from China: A Practical Engineer's Guide to Supply Disruption, EOL, and Cost Optimization
How to find Chinese alternative parts on LCSC, 1688, Alibaba and Huaqiangbei: pin-compatible parts, FCC/CE/TELEC certs, BOM control and quality checks.
China Electronics Manufacturing: May 2026 Update
PMI at 49.0: buyer's market on factory capacity in May 2026, but US tariffs remain at 35–45% and NAND flash prices are rising. What it means for orders.
China Electronics MOQ: What's Real and What's Negotiable
Why Chinese electronics factories quote high MOQs, which costs actually drive them, and what tactics genuinely work for getting lower quantities.
China Electronics Glossary: 80 Terms Every Buyer Should Know
A practical glossary for buyers working with Chinese electronics manufacturers — product categories, factory jargon, certifications, and shipping terms.
China Electronics Tariffs 2026: Landed Cost for Importers
China tariffs hit electronics at 25-35%. HTS lookup by product category, legal ways to reduce duty exposure, and landed cost calculation for US importers.
China Mfg PMI: What Electronics Buyers Need to Know
China's PMI data moves markets and headlines. Here is what it means in practice for hardware buyers placing orders — and what it doesn't.
China Quality Inspection: IPC, DUPRO, PSI and AQL Explained
The three stages of China quality inspection: what each catches, how AQL sampling works, when to use full inspection, and common mistakes.
Shipping from China: Air vs Sea Freight Cost Comparison
Real cost ranges for express, air freight, LCL, and FCL shipping from China — plus the hidden charges most first-time importers don't account for.
Exchange Rate Risk in China Sourcing: Protect Your Budget
When your currency weakens against USD or RMB, your landed cost from China rises fast. How electronics buyers manage FX risk without a treasury team.
China vs India Electronics: What the Search Surge Means
India's electronics ambitions are real and well-funded. The manufacturing ecosystem accessible to Western hardware buyers is a different story.
China vs Vietnam Electronics: Tariffs and Luxshare Effect
Luxshare, German buyer distress, and the EU tariff gap: three forces reshaping the China vs Vietnam manufacturing decision in 2026.
Chinese Factory Quality Levels: What You're Paying For
How to evaluate Chinese factory quality tiers — what separates export-grade OEM factories from domestic suppliers and trading companies.
ESP32 OEM in China: Variants, Modules, and Certification
ESP32 vs ESP32-S3 vs ESP32-C3 — which to specify and why. Sourcing OEM modules, avoiding certification traps, and the BOM mistake that costs a PCB respin.
How to Read a Chinese Factory Quote: Line by Line
What the line items on a Chinese supplier quotation actually mean, the red flags that signal a bad quote, and how to compare multiple quotes fairly.
How to Verify Battery Certification from Chinese Suppliers
Your supplier sent a UN38.3 or IEC 62133 certificate. Here's how to check if it's real, matches your actual cells, and was issued by an accredited lab.
IoT Module Certification: FCC, CE, SRRC Explained
How FCC, CE RED, and SRRC certification actually work for IoT modules made in China — costs, timelines, and the module shortcut that saves months.
Top LED & Solar Imports from China: Summer 2026
Seven LED and solar categories to import from China in summer 2026 — MOQ ranges, factory prices, CE/FCC certification costs, and US tariff impact.
How to Negotiate with Chinese Factories: Tactics That Work
Tactics for negotiating with Chinese factories: what's actually movable, when to push, and what 'give me a better price' signals to suppliers.
PCBA Cost Breakdown: Why Quotes Differ by 3×
The actual cost components behind PCBA quotes in China — PCB substrate, component margin, SMT setup, testing — and how to normalize supplier quotes.
Private Label Electronics China: Costs, Timelines & IP Risks
How private label electronics from China works: ODM spectrum, tooling costs, realistic timelines, and IP risks most buyers ignore.
Q4 Electronics Sourcing: Holiday Order Deadlines
Work backwards from Black Friday and Christmas to find the exact weeks you need to place orders, approve samples, and book freight from China.
Robot Vacuum OEM China: What Private Label Brands Miss
Self-emptying robot vacuums are growing 35–45% annually. Here's what to check before you sign an OEM deal with a Chinese factory.
Robotic Lawn Mower OEM China: Wire-Free, CE, Factories
Robot mower shipments grew 63.8% YoY. Chinese factories now produce wire-free RTK models. What European and US buyers need to know before sourcing.
Shenzhen Electronics Market: Huaqiangbei, What It's For
What Huaqiangbei is good for, what it's not good for, and how to navigate the market without wasting time or buying counterfeits.
Sourcing Electronics from China: A Guide for African Buyers
Payment friction, high import duties, long shipping routes — African buyers face real obstacles. Here is how to navigate them in 2026.
Electronics Supply Chain Risk: 5 Hidden Dangers for Buyers
Supply chain risk management for electronics buyers: five specific failure modes that account for most costly surprises in China sourcing.
What a Factory Audit in China Actually Looks Like
A walk-through of a real China factory audit: what you check, what you learn, what you miss, and when to pay someone else to do it.
When to Use a Sourcing Agent Instead of Alibaba
Alibaba works for repeat orders with proven suppliers — where it breaks down: new factories, custom electronics, FCC/CE certs, and orders above $10,000.
Yiwu for Electronics Buyers: What It's Actually For
Yiwu is the world's largest commodity market — ideal for accessories, LED strips, and packaging. Not for custom electronics, PCBs, or IoT hardware.