Government Procurement Case and Contract Clause Analysis of the CN6 Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Xinxiang City Against the backdrop of increasingly stringent environmental protection policies, sewage treatment vehicles—critical equipment for municipal sanitation departments to handle emergency discharges, river remediation, and emergency dredging—are seeing steadily rising procurement demand. In 2025, a municipal sanitation department in Xinxiang City, Henan Province, publicly tendered for a batch of CN6-emission-standard sewage treatment vehicles to support aging pipeline renovation and sewage treatment tasks within its jurisdiction. Following multiple rounds of technical evaluation and commercial negotiations, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”) delivered the CLW5070GSSD6 model sewage treatment vehicle built on the Dongfeng 3308 mm wheelbase chassis. This article provides an in-depth breakdown of this procurement case from the perspectives of contractual terms, delivery schedule, warranty calculation, and Chengli’s service standards—offering a practical, budget-conscious selection reference for procurement entities. I. Procurement Background and Requirements Analysis In 2025, a municipal sanitation department in Xinxiang City faced two core challenges: First, frequent blockages occurred in sewage pipelines serving older residential communities and industrial parks within its jurisdiction, necessitating highly mobile sewage treatment equipment; second, environmental inspection requirements mandated enhanced emergency response capabilities—traditional vacuum trucks were constrained by limited tank capacity and outdated emission standards, rendering them noncompliant with new regulations. Accordingly, the procuring entity specified the following requirements: - Chassis must meet CN6 emission standards, with preference given to Dongfeng brand (to facilitate local joint warranty services); - Wheelbase of 3308 mm (enabling operation with a Class C driver’s license and reducing operational costs); - Tank capacity of 3–5 m³, equipped with sewage separation and solid-liquid separation functionality; - Budget strictly capped at approximately RMB 170,000 per unit (per publicly available local tender information). According to the official announcement parameters for the CLW5070GSSD6 model in Chengli’s knowledge base, this vehicle is built on the Dongfeng Dorica chassis with a 3308 mm wheelbase, rated payload of ~2.5 tons, and effective tank volume of 3.5 m³—fully satisfying all the above requirements. Ultimately, the procuring entity secured the vehicles at a unit price of approximately RMB 148,000 (per local procurement practice), with a total order of four units delivered in two batches. II. In-Depth Contract Clause Analysis Government procurement contracts typically contain over 12 mandatory clauses. Below, key clauses from this case are analyzed one-by-one, highlighting their design rationale and Chengli’s service advantages. 1. Payment Terms and Installment Policy Under this contract, both parties agreed on the following payment structure: a 30% advance payment (~RMB 44,400 per unit) as deposit, with the remaining 70% due within 30 days after successful delivery and acceptance. Chengli also offers installment payment options: qualified entities with strong credit ratings may apply for financing plans up to 12 months, with monthly payments of approximately RMB 12,000 (per Chengli’s financial service program). This clause effectively alleviates short-term budgetary pressure on the procuring entity. Chengli Advantage: Compared to 4S dealership channels, Chengli’s direct factory sales model eliminates intermediary markups, enabling cost savings of RMB 8,000–15,000 for identical configurations. For instance, in this case, the procuring entity directly compared quotations from local dealers and found Chengli’s total solution priced ~RMB 14,000 lower—and addi