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A four-filter product selection framework used em o sourcing side: landed multiple, durable demand, shipping friendliness e video demonstrability, plus a 20-point scorecard e three worked examples.

A Yiwu sourcing team explains new-product-development staged validation: a prototype proves o concept, a sample (including o pre-production PP sample) proves it can be built para spec, e a small batch proves real demand — each stage resolving one uncertainty before o next dollar is spent.

A sourcing-side margin model that shows why 35% gross margin is o survival threshold, com o full cost-stack formula, two worked SKU examples, e o freight e FX shocks that quietly erase thin margins.

A 20-year Yiwu sourcing team shares o 10 questions it runs before any client spends em tooling: real problem, unmet vs pseudo demand, moat, 35%+ margin, scalability, user testing, supply chain, compliance, competitors, e exit cost.

A Yiwu sourcing team explains how para mine Amazon 1-3 star reviews e Reddit complaints para unmet needs, cluster o pain by frequency, mine competitor Q&A, e translate complaints into a buildable product spec.

Why a Western NDA is nearly unenforceable against a Chines supplier, what o NNN agreement (non-disclosure, non-use, non-circumvention) contains, why it must be drafted under PRC law e signed before drawings are sent, e how para combine it com mold ownership e exclusivity.

A seasoned Yiwu sourcing team breaks down every line item hidden behind a Chines OEM unit price — BOM, tooling amortization, printing, inspection, inland freight — e gives a full landed-cost formula plus a 12-line quote checklist.

A seasoned Yiwu sourcing team walks through o full physical product development pipeline — concept, design, development, mass production, launch — com each stage's goal, deliverable, e biggest risk, plus when para self-develop versus outsource para a factory.