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China’s Supreme People’s Court did not overturn a lower-court ruling in the construction dispute that attracted “patent-related” headlines. In civil judgment (2024)最高法知民终456号, published on May 6, 2025, the Intellectual Property Court rejected Chongqing Jian某 Concrete Co.’s appeal and left the first-instance result in place.
The case concerned private damages from a horizontal cartel in ready-mixed concrete, not patent infringement. The court’s decision explains how a final market-regulator penalty, contract timing and a credible competitive-price benchmark can establish a buyer’s loss.
What the Supreme People’s Court decided
The appellant was a ready-mixed-concrete producer; the respondent was Guangxi Construction Engineering Group Co. The SPC Intellectual Property Court upheld the lower-court disposition. The official judgment concludes, “本判决为终审判决,” meaning the judgment is final.
The Intellectual Property Court designation does not turn the case into a patent dispute. No patent-infringement claim is identified in the official judgment. The underlying cause of action was a private damages claim based on a horizontal monopoly agreement in the ready-mixed-concrete market.
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How the concrete cartel affected the construction buyer
Market allocation and price rules
In 2014, two independent producers in Fengdu county agreed to divide the market geographically, allocate sales volumes and profits, fix standard prices and monitor one another. Their arrangements used a C30 concrete benchmark and set rules for pump and transport charges. The Chongqing Municipal Administration for Market Regulation later found that the conduct fixed sales prices and divided the market, violating China’s 2008 Anti-Monopoly Law.
The regulatory penalty became final
The market regulator fined the concrete company 10,979,561.69 yuan in 2021. The company did not seek administrative reconsideration or judicial review, so that penalty decision became effective. The SPC treated the effective decision as establishing the cartel’s basic facts unless the defendant could rebut them with contrary evidence.
Supply stopped, then the contract price rose
The construction group had a 2017 supply contract. In August 2018, the supplier requested a price increase. When the buyer initially refused, deliveries stopped. The buyer argued that concrete’s specialized nature and the cartel’s control made replacement supply unavailable, delaying the project and causing related losses.
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Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →A supplemental agreement signed on September 12, 2018, increased every listed concrete grade by 90 yuan per cubic meter. Deliveries at the higher prices continued from November 2018 through April 2020.
The figures recorded in the judgment
| Item | Figure and qualification |
|---|---|
| Administrative fine | 10,979,561.69 yuan, imposed by the Chongqing Municipal Administration for Market Regulation in 2021 |
| Higher contract price | 90 yuan per cubic meter above the original listed price, under the September 12, 2018 supplemental agreement |
| Volume supplied at the higher price | 5,192.5 cubic meters, delivered from November 2018 through April 2020, according to the SPC Intellectual Property Court judgment published in 2025 |
| Claimed overcharge | 467,325 yuan, calculated by the construction group and recorded by the SPC |
Why the court rejected the supplier’s defenses
Published local prices were not an unaffected benchmark
The supplier argued that market information and higher input costs justified the increase. The court rejected that explanation because the local published concrete prices relied on prices reported by the same two companies found to have formed the cartel. Data generated by the cartelists could not, on this record, show what a competitive price would have been.
That reasoning makes the counterfactual price the central damages issue. A claimant cannot simply point to a published figure if the figure incorporates the defendants’ coordinated prices. The evidence must instead address what the buyer would probably have paid without the monopoly agreement.
The cartel’s practical effect did not end with the formal agreement
The supplier contended that any effect ended when the formal arrangement stopped in March 2019. The SPC disagreed. The supplier did not disclose the cartel to the buyer and did not voluntarily reduce the buyer’s price afterward. The court therefore found that the adverse effect continued through the April 2020 deliveries covered by the claim.
What this ruling changes for private antitrust claims
The SPC’s accompanying case analysis states a broader evidentiary rule: when a transaction party bought from a cartel participant during the monopoly period or during a reasonable period afterward, and there is no rebuttal evidence, the buyer may be presumed to have suffered loss caused by the horizontal monopoly agreement.
The presumption does not eliminate the need to prove the transaction and the amount claimed. It connects several questions that courts will examine together:
- Whether a market-regulator penalty is final and can establish the cartel’s basic facts.
- Whether the claimant purchased during the cartel or a reasonable “tail” period after the formal arrangement ended.
- How the claimant estimates the competitive price that would have applied without coordination.
- Whether the defendant offers credible evidence breaking the link between the cartel and the alleged overcharge.
Practical evidence checklist for construction buyers
A buyer pursuing a similar claim should preserve a complete record rather than relying on the existence of a regulatory penalty alone:
- Identify the covered transactions. Keep the original supply contract, delivery tickets, invoices, payment records and any change orders showing quantities and prices.
- Pin down the timing. Map each purchase against the cartel period, any formal termination date and the later deliveries for which damages are claimed.
- Document the price change. Preserve requests for increases, refusal notices, suspension messages and supplemental agreements, including the effective date and affected product grades.
- Show replacement-supply constraints. Record concrete specifications, site requirements, available producers, transport limits, pump arrangements and project-delay consequences.
- Build an independent benchmark. Test whether proposed comparison prices come from genuinely competitive transactions; a published local price may be unreliable if cartel participants supplied the underlying reports.
- Address rebuttal evidence. Anticipate explanations based on input costs, market movements or post-cartel conditions and tie each response to contemporaneous records.
Why the headline needs correction
The decision is significant because it confirms a workable path for private recovery after an antitrust enforcement action, not because it changes patent law. The SPC affirmed rather than reversed the lower court, and the official record describes a ready-mixed-concrete cartel damages dispute. Describing it as a patent-infringement ruling or an SPC “overturn” would misstate both the subject and the outcome.
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