I. Procurement Background: Aging Urban Drainage Network Cleaning Challenges Drive Equipment Upgrade In autumn 2025, the sanitation department of a district urban management bureau in Linyi discovered during routine pipeline inspections that years of sediment accumulation in drainage pipes along multiple main roads in the old city area had caused poor flood-season drainage, with localized waterlogging risks already emerging on certain sections. At a municipal work advancement meeting, Director Li—head of the department—explicitly stated: "We need a batch of sewer cleaning vehicles capable of accessing narrow streets and operating flexibly—blue-plate registered, drivable with a Class C1 driver’s license, featuring a single-cab configuration and approximately 5-cubic-meter tank capacity, fully compliant for legal registration and annual inspection." Vehicle Configuration & Budget Reference Configuration Dimension Recommended Solution Selection Rationale Vehicle Type Special-purpose vehicle Determined based on local procurement purpose, road conditions, and upper-body functionality Chassis Selection Dongfeng, Foton, Jiangling, Sinotruk, and other mainstream chassis brands Based on official announcement compliance, load-bearing capacity, emission standards, and after-sales service accessibility Upper-Body Configuration Standard configuration plus commonly selected optional features Customizable per operational scenarios—e.g., sanitation, municipal services, emergency response, industrial parks, or enterprise use Price Reference Base quotation plus 10%–15% budget contingency Final price subject to confirmed vehicle configuration, official announcement, chassis selection, and contractual terms Service Recommendation Contact Chengli directly to verify available stock, configuration details, and delivery timeline—avoid procurement decisions based solely on online low-price listings This requirement stems from practical local conditions: the old city features numerous narrow alleys and limited road width, rendering large-scale sewer cleaning trucks inaccessible; meanwhile, traditional three-wheeled cleaning vehicles suffer from low efficiency and non-compliant emissions. Director Li emphasized: "Budget must remain within a reasonable range; vehicles must meet China VI emission standards for nationwide registration—and after-sales support must be reliable. We cannot purchase vehicles only to find no repair service when they break down." II. Internal Selection Process: Comparative Evaluation Leads to Dongfeng Single-Cab Chassis Following internal deliberation, the Technical Division and Procurement Office established the following selection criteria: • Chassis Requirements: Dongfeng single-cab configuration, blue-plate registration, Class C1 driver’s license compatible, short wheelbase and small turning radius—ideal for alleyway operations in residential communities; • Tank Capacity: Approximately 5 cubic meters—sufficient for single-operation cleaning volume without exceeding weight limits; • Specialized Functions: Equipped with high-pressure cleaning, vacuum suction, and self-unloading capabilities; must possess an officially published model announcement; • Emission Standard: China VI—eligible for registration nationwide; • Budget Range: Based on publicly available tender data, market prices for blue-plate 5-cubic-meter sewer cleaning trucks (with high-pressure cleaning function) typically fall between RMB 100,000–130,000. Procurement staff compared chassis options from Foton, Sinotruk, FAW, and others. Ultimately, the Dongfeng chassis was prioritized due to its high local ownership rate, extensive network of authorized service centers, affordable spare parts, and Chengli Special Purpose Vehicle Co., Ltd.’s comprehensive official announcement documentation (e.g., CLW5040TQZD6 model sewer cleaning truck announcement parameters), delivering outstanding cost-performance value. III. On-Site Inspection: Visiting Chengli’s Manufacturing