Overview
商易跨境咨询 (sunyeap.com, also branded SINY / Shangyi) is a Shenzhen cross-border tax and compliance firm, not an ERP and not a product-research tool. The public menu covers multi-country VAT registration and filing, German WEEE and other EPR, EU/UK authorised reps, GPSR, overseas companies and banking, trademarks and patents, plus marketed overseas warehouses and customs. It says it was founded in 2018, is on Amazon SPN, and lists offices in the UK, Germany, the US, Mexico, Brazil, and Japan.
Sellers usually need more than one UK VAT number: DE/FR/IT/ES filings, packaging law, a local entity, and a trademark on the same timeline. Shangyi also sells a “self-serve terminal” opened to external users at the end of 2022: VAT calculation from Amazon reports, with copy that also covers eBay, AliExpress, Wish, and independent stores, across UK, DE, IT, ES, FR, PL, CZ, NL, SE, AT plus AE, SA, MX, CA, AU.
There is no public price card. News posts and a Sohu profile list 19866981413 and yezi@sunyeap.com; older pages show 15012861425. Search Amazon SPN for 「商易」 before you treat the homepage badge as current.
Core features and advantages
Multi-country VAT and self-serve filing
The classic path is register-and-file. Shangyi also pushes SaaS calculation: Amazon report ingest, multi-country rules, marketed B2B and Intrastat. That matters if you already have volume and hate email ping-pong; a first German VAT is still documents plus the tax office queue. Trust the live country list on the product page, not “global VAT.”
EPR, WEEE, GPSR, authorised reps
Early pages already paired German WEEE with EU VAT. Current copy adds packaging EPR, GPSR, and authorised representatives. Amazon and Temu tightened packaging and EU-rep checks in 2026; you need a number that resolves on the official register, not a screenshot. Scope every destination country and category in the contract.
Overseas companies, IP, and warehouse marketing
The strategy page lists company formation, IP, legal, tax planning, and — separately — China high-tech / R&D subsidy work for domestic SMEs. That last line is not a shop tool. News claims local tax credentials (CPA, ACCA, licensed tax accountant, and so on); this page did not verify certificate numbers. A 2021 Berlin warehouse announcement and later “we have warehouses” copy exist; treat 2026 warehouse capacity as a quote, not a catalog fact.
Supported platforms
Clients are shops on Amazon, eBay, AliExpress, Wish, independent sites selling into the UK/EU, Middle East, Mexico, Canada, Australia. The filing engine reads sales reports; it does not replace Seller Central. Japan compliance appeared in 2026 SPN-related posts. This is not a Shopify checkout tax widget (that is Zonos-class).
Who it's for
- Small Amazon / multi-channel sellers who need UK/DE VAT plus packaging, and maybe a UK/DE company.
- Sellers who already have numbers and want to test whether the self-serve terminal can eat their reports.
- Skip it if you only need landed-cost at checkout (Zonos), if you want a cheap published UK VAT subscription (compare eVAT Master), or if you read SPN as an Amazon guarantee.
Concrete use case: before adding a French 3PL on top of German FBA, list every VAT and EPR you already hold, ask Shangyi for a written gap list and cycle times, and do not ship until the IDs exist.
Pricing and value
As of 2026-09-06 the site has no public packages. Peer brands advertise UK VAT bundles around a thousand RMB and German higher — market colour, not Shangyi’s quote. Filing software, companies, WEEE, and warehousing are project work. Split registration, filing, letters, penalty liability, and EPR eco-fees in the comparison. This page invents no prices.
Community feedback
Long-form public reviews are scarce. Sohu, AMZ123, and owned news dominate; Reddit/Zhihu case studies barely exist. SPN listing is a checkable platform action, not a reputation score. Before you sign: SPN search, redacted filing receipts, register lookup. Support is WeChat/phone, not an English ticket desk.
Competitive positioning
eVAT Master productizes filing as a subscription with clearer public prices. 卖家参谋 is a lighter VAT/EPR agent with more AliExpress copy. Zonos prices tax at checkout and does not obtain a German VAT for a Chinese seller. Shangyi’s cut is agent + self-serve filing + overseas company as a bundle; depth depends on which slices you buy.
Alternatives
- 卖家参谋 — human VAT/EPR agency, AliExpress-heavy.
- eVAT Master — online filing SaaS with more transparent UK/DE subscriptions.
- Zonos — checkout duty/tax, not an EU VAT registrar.
Limitations
Opaque pricing. Mixed product lines (domestic high-tech filing is not the VAT desk). Warehouse and credential claims need item-level checks. The site is dated; EN/ZH depth differs. Agents cannot stop audits or marketplace takedowns. SPN badges expire — re-check each contract.
Verdict
Shortlist Shangyi if you need EU VAT/EPR plus a possible overseas company and want to try self-serve filing. Pick a narrower product if you only want cheap UK returns or a checkout tax widget. Look every number up on the authority site.
Next step: open sunyeap.com or email yezi@sunyeap.com with marketplaces and ship-from countries for a written scope, and search Amazon SPN for 「商易」.
Data notes
Rechecked 2026-09-06 against sunyeap.com home, SPN/self-serve news, and public profiles. published (2024-03-15), monthlyVisits, domainRating, and authorityScore are catalog placeholders and unverified. Founding year per vendor: 2018. Tax licences, warehouse list, and prices unverified. Email from the company’s Sohu profile.