Extract the local UniUni (UUS… / JY…) barcode from Cainiao LP… and CNUS… tracking numbers and track doorstep delivery.

AliExpress Choice and Cainiao Standard Shipping heavily utilize UniUni for final-mile delivery across major US and Canadian metro areas. A shipment begins in Dongguan or Hangzhou with a Cainiao LP00… or CNUS… barcode, clears customs at LAX, JFK, ORD, YVR, or YYZ, and receives a UniUni tracking number for doorstep photo-verified delivery.

Try a live tracking number:

Barcode transition: Cainiao to UniUni

When Cainiao clears customs and hands off to UniUni, lastscanned surfaces the secondary tracking number in the top-level message field.

Origin / middle-mile carrier
Cainiao (cainiao)
Cainiao LP00… / CNUS… / AP00… barcode
^(LP\d{14}|CNUS[A-Z0-9]+|AP\d{14})$
Origin example
AP00830954074290
Final-mile carrier
UniUni (uniuni)
UniUni UUS… / JY… tracking number
^(UUS|JY)[A-Z0-9]{10,20}$
Final-mile example
UUS5BM1269395824723
Extracted in .message
Last-mile UniUni barcode surfaced when assigned at gateway

How the Cainiao → UniUni handoff works

Follow the parcel across both networks without waiting on asynchronous webhooks or losing visibility at the handoff boundary.

1. AliExpress merchant pickup & Cainiao consolidation
Cainiao consolidates multiple AliExpress Choice items into a single combined parcel (LP00… / CNUS…) at its smart warehouse in Dongguan.
2. Charter air linehaul & US/CA customs clearance
The parcel flies to Los Angeles, New York, Chicago, Vancouver, or Toronto and clears CBP Type 86 or CBSA customs.
3. UniUni gateway induction (Gateway transit in)
Cainiao transfers the parcel to UniUni’s local sort facility, where UniUni scans the UUS… barcode and assigns a driver for final delivery.
Cainiao query
GET /v1/track/AP00830954074290 (auto-detected as cainiao)
UniUni query
GET /v1/track/UUS5BM1269395824723 (auto-detected as uniuni)
Handoff resolution
Query both the origin Cainiao barcode and the linked UniUni UUS… barcode under the same JSON schema

Chain Cainiao → UniUni in code or MCP

Resolve both legs synchronously in TypeScript, curl, or your AI support agent via Streamable HTTP MCP.

REST (Synchronous GET)

# 1. Query Cainiao origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/AP00830954074290" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted UniUni barcode:
curl "https://api.lastscanned.com/v1/track/UUS5BM1269395824723" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

TypeScript (Automatic Handoff Chaining)

const headers = { Authorization: `Bearer ${process.env.LASTSCANNED_API_KEY}` };
const originRes = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(number)}`, { headers });
const originPkg = await originRes.json();

// Extract secondary barcode from top-level message ("Last-mile UniUni barcode surfaced when assigned at gateway")
const handoff = originPkg.message?.match(/^Handed to (.+?) as ([A-Z0-9-]+)$/i);
if (handoff) {
  const [, , lastMileNumber] = handoff;
  const destRes = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(lastMileNumber)}`, { headers });
  const destPkg = await destRes.json();
}

Remote MCP (Claude Code / Cursor / ChatGPT)

claude mcp add --transport http lastscanned https://mcp.lastscanned.com \
  --header "Authorization: Bearer lsk_live_YOUR_API_KEY"

Cainiao (AliExpress Standard Shipping) to UniUni US & Canada Last-Mile Handoff Tracking FAQ

Does Cainiao hand AliExpress packages off to UniUni?
Yes. UniUni is one of Cainiao’s primary last-mile delivery partners in the United States and Canada for AliExpress Choice and Standard Shipping orders.
How do I track my package once Cainiao says Received by local delivery company?
Once Cainiao scans Received by local delivery company, query the linked UUS… (or CNUS…) barcode on lastscanned (?carrier=uniuni) to see UniUni’s Gateway transit in, Out for delivery, and proof-of-delivery scans.

Other carrier handoff guides

Explore cross-border last-mile barcode extraction and domestic USPS consolidator overrides across all 273 carriers.

All 273 supported carriers

International posts and couriers

Cross-border