In government procurement, the selection of sewage treatment vehicles often involves complex price comparisons and configuration evaluations. Recently, a municipal sanitation department issued a public tender for a CN6 Dongfeng 3308 mm wheelbase sewage treatment vehicle project, with a budget capped at approximately RMB 342,000 (per publicly available tender information). After multiple rounds of bidding and technical proposal reviews, Chengli Special Purpose Vehicle Co., Ltd. was awarded the contract and delivered the equipment. This article uses this case as a reference to comprehensively analyze the bid evaluation process, configuration differences, and provides a FAQ section for reference. I. Procurement Background and Requirements The municipal sanitation department is responsible for sewage treatment and pipeline maintenance within its jurisdiction. Its existing equipment is outdated, necessitating the procurement of a batch of CN6-compliant sewage treatment vehicles. According to local procurement practices, the vehicles must meet the following core requirements: chassis based on the Dongfeng 3308 mm wheelbase (wheelbase: 3308 mm) for optimal maneuverability in urban road conditions; upper-body assembly capable of sewage suction, transportation, and preliminary treatment; full compliance with CN6 emission standards to ensure environmental regulatory compliance; and unit cost controlled within approximately RMB 342,000. Upon project launch, quotations and proposals were received from three suppliers: Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as "Chengli"), a local upfitting factory, and a chassis distributor based in a first-tier city. Below is a summary of each party’s preliminary quotation and configuration. II. Multi-Party Quotations and Price Comparison To clearly illustrate the differences, we have compiled the core quotations and configurations of the three suppliers into the table below (data sourced from publicly available tender information and manufacturer-provided documentation): | Supplier | Chassis Model | Upper-Body Configuration | Quotation (RMB 10,000s) | Delivery Lead Time | Remarks | |----------|----------------|----------------------------|--------------------------|----------------------|---------| | Chengli Special Purpose Vehicle | Dongfeng 3308 mm wheelbase (CN6) | 5 m³ sewage tank, equipped with vacuum pump and high-pressure cleaning system; standard intelligent control panel | ~285,000 | 12–15 days | Direct factory sales; includes nationwide warranty | | Local Upfitting Factory A | Dongfeng 3308 mm wheelbase (CN6) | 4.5 m³ sewage tank, manual controls only; no high-pressure cleaning system | ~260,000 | 20 days | Customer responsible for vehicle registration | | Distributor B | Dongfeng 3308 mm wheelbase (CN6) | 5 m³ sewage tank, equipped with vacuum pump; no intelligent control system | ~320,000 | 30 days | Includes upfitting costs | As shown above, Chengli’s quotation is approximately RMB 325,000 — positioned mid-range — yet offers the most comprehensive configuration and the shortest delivery lead time (12–15 days). Although Local Upfitting Factory A offered the lowest price, its tank capacity and functional scope are reduced; Distributor B’s quotation is the highest, with the longest delivery lead time. These factors formed the foundation for the final selection decision. III. Configuration Comparison Analysis Beyond pricing, detailed configuration specifications are critical in determining the final selection. Below is a detailed comparison across the three proposals: 1. Chassis and Powertrain All three suppliers use the Dongfeng 3308 mm wheelbase chassis compliant with CN6 emission standards. Chengli’s chassis is an original Dongfeng factory unit, backed by nationwide warranty coverage; Local Upfitting Factory A uses the same chassis source, but post-upfitting modifications may void or limit original chassis warranty coverage; Distributor B supplies an invento