Case Study: Nantong’s Dongfeng D6 Blue-Plate Sewage Treatment Vehicle Government Procurement — Comprehensive Analysis of Contract Clauses and Winning Bid Solutions. In municipal sanitation equipment procurement, the rigor of contract terms directly impacts project implementation efficiency and long-term operational costs. This article takes a real-world case — the procurement of Dongfeng D6 blue-plate sewage treatment vehicles by a district Urban Management Bureau in Nantong, Jiangsu Province — as its entry point, offering an in-depth analysis of core clauses in government procurement contracts. Combined with Chengli Special Purpose Vehicle Co., Ltd.’s practical delivery experience, it provides a referenceable solution framework for similar procurements. The vehicle model involved in this case is CLW5070GSSD6 (announcement model), built on the Dongfeng D6 chassis and equipped with a China VI-compliant engine, suitable for urban sewage collection, transportation, and emergency treatment. According to publicly released tender information, this procurement project — titled “Specialized Procurement of Sewage Treatment Vehicles for a District in Nantong” — had a budget cap of approximately RMB 436,000, with plans to acquire two blue-plate sewage treatment vehicles. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. successfully passed stringent qualification reviews and technical alignment assessments, delivering two Dongfeng D6-chassis sewage treatment vehicles. Customer feedback confirmed stable equipment operation and seamless license registration and annual inspection processes. Below is an analytical breakdown across key dimensions: contract terms, delivery timeline, and warranty calculation. I. Essential Procurement Contract Clauses: Key Elements Illustrated by the Nantong Case Government procurement contracts typically specify clear technical specifications, pricing terms, payment methods, and liability for breach. In the Nantong case, the critical contractual clauses included: Technical Specifications Confirmation: The vehicle must bear the official announcement model number CLW5070GSSD6, with a tank capacity of approximately 3.5 m³ (referencing comparable parameters for 5 m³ water-sprinkling trucks in the knowledge base; sewage treatment vehicle capacities are similar), equipped with a self-priming sewage pump and compliant with China VI emission standards. Pricing and Payment Terms: Unit price approximated RMB 190,000 (based on 2026 inclusive-tax landed prices: blue-plate 5 m³ water-sprinkling trucks range from RMB 112,000–132,000; sewage treatment vehicles command a premium due to higher specialized equipment costs). Payment terms stipulated a 30% advance upon contract signing, with the remaining 70% payable upon successful acceptance. Acceptance Criteria: Submission of copies of the MIIT vehicle announcement, full-vehicle Certificate of Conformity, and chassis Certificate of Conformity was mandatory. On-site testing required a sewage pump suction lift ≥ 5 meters and flow rate ≥ 30 m³/hour. Liability for Breach: Late delivery incurred a penalty of 0.1% of the total contract value per day; after-sales service response time was guaranteed within 24 hours. Chengli explicitly committed in the contract to “transparent configuration — no bundled pricing,” a clause highly appreciated by the Nantong client for eliminating post-contract price escalation risks. For similar procurements, it is strongly recommended to verify completeness of official announcements (e.g., CLW5070GSSD6 has been registered and filed in multiple regions nationwide) to ensure smooth registration and annual inspection. II. Delivery Timeline Commitment: Chengli’s Practical Implementation of Standard 7–15-Day Delivery In the Nantong case, delivery timeline was a top priority for the client. Per contractual agreement, equipment delivery was required within 15 working days following contract execution. Leveraging its local production base in Suizho