What is the real-world lead time from Suzhou to the United States in winter?

The particulars: Suzhou · the United States.

I would like help reading this properly rather than being told what conclusion to reach.

I have the full report including the method section, so I can quote specifics if that helps.

What can I legitimately conclude from this figure?

Answering this needs the origin and destination pair, because lane behaviour varies far more than carrier marketing suggests.

A single phase-change pack in a thin-walled box holds below ten degrees for roughly one to two days at twenty-five degrees ambient and under a day at thirty-five. On a twelve-day lane the material is at ambient for most of the journey regardless of what was packed.

Tracking quality is the more informative signal: continuous scanning at every hop indicates a real logistics chain, and a tracking number that goes dark for a week indicates something else.

Judge the lane by tracking continuity rather than by days elapsed.

The short version: nine to fourteen days is normal, the pack is spent within two, and the solid does not mind.

A single-use temperature data logger costs a few pounds and converts speculation into a record. If the temperature history matters to you, buy one rather than arguing about packaging.

That is the argument for shipping lyophilised. A dry powder with low residual moisture is chemically stable at ambient for months; the degradation pathways that matter need water.

Single-use temperature loggers are inexpensive and are standard practice in any supply chain where temperature actually matters.

Ask for a hold during a heatwave. The better suppliers agree without being pushed.

This is where the anxiety in this hobby is most disproportionate to the actual risk.

Anything shipped in solution is a genuinely different risk, because hydrolysis and deamidation proceed in the aqueous phase and are strongly temperature-dependent.

Lyophilised solids tolerate ambient transit. That is the whole answer for most orders.

Start with the physical state. Lyophilised powder is stable at ambient for the duration of any normal lane; anything in solution is a different conversation entirely.

Summer lanes are worse than winter lanes for the pack and no different for the solid, which is why the seasonal anxiety is largely misdirected.

Phase-change pack hold times are a function of mass, latent heat and box insulation, and published figures for small parcels are on the order of a day or two.

A liquefied pack on arrival is expected. It is not evidence of a problem.