Chapter 1 Public Bidding 1. Bidding Conditions The name of this bidding project is the Public Bidding for Supervision Services of the Yesanhe Hydropower Station Diversion Tunnel Treatment Project of Changyuan Electric Power Enshi Company. The project bidding number is CEZB250504493, and the bidder is Guoneng Changyuan Enshi Hydropower Development Co., Ltd. The project unit is Guoneng Changyuan Enshi Hydropower Development Co., Ltd., and the funding source is self raised. The bidding agency is National Energy Group International Engineering Consulting Co., Ltd. This project has met the bidding conditions and is now undergoing domestic qualification review and open bidding. 2. Project Overview and Bidding Scope 2.1 Project Overview, Bidding Scope and Section (Package) Division: 2.1.1 Project Overview, Bidding Scope and Section (Package) Division. Engineering control progress: This project will be implemented in two phases. The first phase will be from September 1, 2025 to March 31, 2026. Preparation for construction outside the tunnel will begin in September, and construction inside the tunnel will begin in early November and be completed by March 31, 2026, to ensure that the tunnel can safely and normally supply water and generate electricity; The second phase is from November 1, 2026 to March 31, 2027. 2.1.2 Service period: The supervision service period for this bidding project is 15 months. The plan is to start from the date of signing this supervision contract (planned for September 1, 2025) and complete and accept all supervision works of this bidding project (planned for June 30, 2027). 2.2 Other:/3. Qualification Requirements for Bidders 3.1 Qualification Conditions and Performance Requirements: [1] Qualification Requirements: (1) Bidders must be independent legal persons or other organizations registered in accordance with the law, and must provide valid supporting documents. (2) Bidders must possess and provide valid comprehensive qualifications for engineering supervision or Class B or above qualification certificates for water conservancy and hydropower engineering supervision. 【2】 Financial requirements: [3] Performance requirements: From May 2020 to the bid deadline (based on the signing time), bidders must have at least one contract performance for construction supervision services of hydropower station diversion tunnels (or emptying tunnels; or diversion tunnels; or spillway tunnels; or tailwater tunnels) with an installed capacity of 50MW or more. Bidders must provide scanned copies of the contract that can prove the performance requirements of this bidding. The scanned copies of the contract must include at least: the stamped pages of both the buyer and seller, the date of contract signing, and key information pages in the performance requirements. 【4】 Credit requirements: [5] Qualification requirements for the Chief Supervising Engineer: (1) Bidders must provide a valid registration certificate for the proposed Chief Supervising Engineer's (water conservancy engineering construction supervision or water conservancy and hydropower engineering) professional qualification. (2) The chief supervising engineer must have at least one director or deputy director who has served as a construction supervision service for hydropower station diversion tunnels (or emptying tunnels; or diversion tunnels; or spillway tunnels; or tailwater tunnels)