1. Bidding conditions: The first phase of the expansion project of the Nanjing Xuancheng Expressway Airport Hub to Hefeng Hub has been approved for construction by the Jiangsu Provincial Development and Reform Commission with the "Reply of the Provincial Development and Reform Commission on the Feasibility Study Report of the First Phase of the Expansion Project of the Nanjing Xuancheng Expressway Airport Hub to Hefeng Hub" (Su Fa Gai Ji Fa [2024] No. 1066). The construction funds come from the Jiangsu Provincial Expressway Operation and Management Center and the special bond for toll roads. The project has met the bidding conditions and has been entrusted by the Nanjing Public Works Construction Center. The bidding agent, Jiangsu Wujin Engineering Consulting Co., Ltd., is now responsible for the construction of the main project NXKJ-2 and NXKJ-2 of the first phase of the expansion project of the Nanjing Xuancheng Expressway Airport Hub to Hefeng Hub. J-3 section will undergo domestic public bidding and qualification review. 2. Project Overview and Bidding Scope 2.1 Project Overview S55 Ningxuan Expressway is part of the "Jiangsu Province Expressway Network Plan (2017-2035)"; Fifteen shots, six verticals, and ten horizontals; In the layout,“ Shooting Nine "; The line runs north-south and is located within the territory of Nanjing City, passing through Yuhuatai District, Jiangning District, Lishui District, and Gaochun District. It is an important inter provincial passage between Jiangsu and Anhui provinces, and also one of the channels connecting Nanjing and Hangzhou. The section from the Nanjing Xuancheng Expressway Airport Hub to the Hefeng Hub is an important component of the Nanjing Xuancheng Expressway, serving as a crucial transportation hub for Nanjing Lukou International Airport and external travel in Lishui District. Its significance is significant. The first phase of the expansion project of the Nanjing Xuancheng Expressway from the Airport Hub to the Hefeng Hub (hereinafter referred to as the "Project") is an airport hub expansion and renovation project, located on the east side of Lukou Airport and serving as the connecting node between the Airport Expressway and the Ningxuan Expressway. The route of this project starts from the south side of the airport toll station on the Nanjing Xuancheng Expressway, crosses Jinhang Road, Qinhuai River, and Nanjing Metro Line S7, and ends at the north side of Zhetang Interchange, connecting to the current Ningxuan Expressway. The total length of the route is about 4.185 kilometers. The recommended overall expansion plan will be adopted for the entire line, with the renovation and expansion of one interchange at the airport hub, and the simultaneous construction of necessary transportation engineering and facilities along the line. The Ningxuan Expressway within the scope of this project is constructed according to the standard of a two-way eight lane expressway, with a design speed of 120 kilometers per hour and a roadbed width of 42 meters; The airport expressway is constructed according to the standard of a separated two-way six lane expressway, with a design speed of 80 kilometers per hour and a single roadbed width of 16.5 meters. The new bridge and culvert are designed with a vehicle load of Highway-I level, and other technical indicators shall be implemented in accordance with the relevant provisions of the "Technical Standards for Highway Engineering" (JTGB01-2014) issued by the Ministry of Transport. 2.2 Scope of Tender This tender project is the construction of the main project of the first phase of the expansion project of the Nanjing Xuancheng Expressway Airport Hub to Hefeng Hub, consisting of two sections, namely NXKJ-2 and NXKJ-3 sections. NXKJ-2 section: Pile number K26+615.000~K28+362.00, section length 1.747km, civil engineering construction (excluding the first stage construction content) and overall construction within the pile number range