Direct answer

The MSA does not automatically control every PO; conflicting terms are a formation and evidence problem.

Parties often sign a framework (MSA) and then issue POs, PI, vendor confirmations and WeChat quantity changes. Under the Civil Code, later specific terms can form or vary a contract if the parties agree, including by performance. A clause that ‘MSA prevails over PO’ helps only if it is consistent in both languages and actually followed. Vendor standard terms printed on a confirmation, or a quality spec attached only in Chinese, frequently override an unread English MSA in practice.

The classification screen

4 questions before you choose the route.

This page identifies the right question and evidence. It does not determine the legal outcome on a reader’s facts.

01

What is the stack of documents?

MSA, PO, PI, quality protocol, vendor T&Cs, WeChat deltas.

Stack
02

Which text claims to prevail?

Read both language versions of the order of precedence.

Precedence
03

Was the PO an offer or a confirmation?

Who sent the last paper before shipment started.

Last shot
04

Did performance accept the other terms?

Shipping after a conflicting confirmation is often treated as assent.

Conduct

Working rule: Map the regulated role before marketing or launch in China.

What changes the answer

The signal ledger.

These facts move the question beyond a label and into a product, money-flow and control analysis.

Signal
Ask the operating question
Why it changes the route
Conflicting forum or cap
Do the MSA and the PO name different courts, damages caps or quality standards?
Those are the clauses that actually decide a China supply dispute.
Chinese vendor T&Cs
Were standard terms on the back of a stamp or PDF confirmation?
They may be part of the deal if your side performed without objection.
Quantity and SKU drift
Did WeChat change the PO after the MSA freeze?
The live commercial deal is often in the chat, not the MSA.
Prepare before you escalate

Bring a compact evidence docket—not a pitch deck.

Give a compliance team or counsel the operating facts that reveal the perimeter.

01Document stackMSA, each PO, PI, confirmations and specs.
02Precedence clauseBoth language versions.
03Shipment and paymentWhat was actually performed against which paper.
04WeChat/email deltasQuantity, date and spec changes after the PO.
Common confusions

Questions people ask before they build.

Short answers for orientation. The right result can change with the service model and current rules.

If the MSA says it prevails, can we ignore the PO quality annex?

Not safely. A specific quality protocol attached to a performed PO is often treated as the deal the parties actually ran, unless you objected in time.

Do we need a PO if the MSA is detailed?

You still need a clear ordering mechanism for quantity, SKU and delivery dates. Otherwise you argue about whether a WeChat request was an order.

Primary authorities

Reviewed sources support orientation, not a fact-specific assessment.

PRC Civil Code (gov.cn)
National laws database (NPC)
Supreme People’s Court