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The latest progress on Khanh Hoa – Buon Ma Thuot highway has reached nearly 80% construction output, with Trungnam E&C concentrating all efforts to complete the asphalt surface layer and install the lighting system at the Provincial Road 10 bridge section. Accelerating Towards 80% Progress at Package 03 In early December, the labor atmosphere at the high-speed highway construction site managed by Trungnam E&C is extremely urgent. Taking advantage of favorable weather conditions in November and December, all construction teams have operated at full capacity to accelerate progress. The appearance of the highway section (from km 101+500 to km 117+593) spanning over 16km is gradually becoming complete, marking an important transition from the foundation construction phase to the finishing phase. Completing the Road Surface and Organizing Traffic To ensure quality and aesthetic appeal for the project when put into operation, engineers and workers are focusing intensely on the final technical components: • Polymer C16 Asphalt Concrete Layer: This is the key item determining the smoothness and durability of the highway. Construction work is closely supervised to ensure strict compliance with technical requirements for temperature and compaction standards. • Traffic Safety System: In parallel with surfacing, numerous directional signs and guardrail systems are being installed comprehensively. These components not only create a “safe corridor” but also contribute to professional appearance for the entire contract package. Highlight at the Intersection (TL10) One of the notable components during November construction was the completion of the lighting system at this intersection area. Light poles and the electrical lighting system on the bridge are being rapidly installed and connected. When completed, this lighting system will ensure maximum visibility and safety for vehicles passing through the bridge area, while creating a modern landscape highlight for the project at night. Bringing Experience to Every Project Trungnam E&C

The Phuoc An Bridge project reaches a significant milestone: successfully installed 4 cable stays at T38 tower in November 2025, exceeding the timeline by 6 months, on track to achieve technical operation by the end of 2026. Scale of the “Super Project” Phuoc An Bridge    The Phuoc An Bridge project commenced in June 2023 with a total investment of approximately 4,900 trillion VND: • Location: Phu My (HCMC) ↔ Nhon Trach (Dong Nai) • Type: Modern Extradosed cable-stayed bridge, the most advanced of its kind, with a main span of 250m • Clearance: 55m height, ensuring vessels with 30,000 DWT capacity can operate smoothly on Thi Vai River • Scale: 4.38km long (main bridge 3.5km), 6 lanes, speed limit 70km/h • Progress: 6 months ahead of schedule • Contractor: Trungnam E&C – Bac Trung Nam construction consortium building main tower T38 • Expected operation: End of 2026 This project helps shorten the distance from the Cai Mep – Thi Vai port area to the Ben Luc – Long Thanh expressway by approximately 30 km, reducing traffic pressure on National Highway 51 and boosting logistics capabilities in the strategic southern economic region. Construction Progress at T38 Tower in November The project management board of the Transportation Sector and the Department of Agriculture in Ba Ria – Vung Tau reported that construction activities at the Phuoc An Bridge are progressing urgently 24/7. The most notable achievement in November 2025 was the successful installation of 4 cable bundles at the main T38 tower by the Trungnam E&C – Bac Trung Nam consortium. Completing 4 cable bundles in just over 2 months since the first cable installation on September 4, 2025, demonstrates the contractor’s superior construction capabilities. The construction team is carefully preparing plans to install the next cable bundles in Q4

On the morning of November 18, 2025, Trungnam E&C and the joint contractors officially commenced the Rach Xuyen Tam project, located in the Binh Thanh – Go Vap area. The project will officially revive the canal, bringing a new green, clean, and beautiful appearance to Ho Chi Minh City. Overview of Rach Xuyen Tam Project Rach Xuyen Tam has a total length of 8.875 km, including a 6.638 km main route and three branch routes—Cau Son, Binh Loi, and Binh Trieu—with a combined length of 2.237 km. This canal plays a vital role in the city’s drainage system and environmental regulation. For many years, Rach Xuyen Tam has been one of the most severely polluted areas. The commencement of this project marks an important step in efforts to dredge the canal, improve the environment, and build synchronized transport infrastructure along both sides of the canal, contributing to improved water flow, reduced flooding, and enhanced urban landscape. Trungnam E&C is responsible for Package XL-01, with a length of 2.94 km and a total investment of over VND 1,160 billion: the section from Nhieu Loc – Thi Nghe Canal to Bui Dinh Tuy Bridge, including Cau Son Canal (from Km0+000 to Km2+512). Dredging the canal bed, environmental improvement, and waste treatment; Construction of the drainage system and roads along both sides of Rach Xuyen Tam; Construction of embankments, technical infrastructure, and green landscaping. The project implementation period is 950 days, with a commitment to ensuring schedule – quality – safety – efficiency. Upon completion, the canal will become a green – clean – beautiful space, integrating transportation and landscape to serve the community. Vice Chairman of the Ho Chi Minh City People’s Committee, Mr. Bui Xuan Cuong, emphasized that the project is multi-purpose in nature, not only improving water quality and the

At Package XL-18 (Km 5+260 – Km 6+200), the construction progress is clearly differentiated between two main items: roadbed and viaduct structure. Bien Hoa – Vung Tau Expressway Project is facing the biggest challenge from prolonged rains. Roadbed: Mud slows down K98 In many areas of Package XL-18, the muddy and soggy ground after the rain has caused the roadbed construction to be halted, and many heavy machinery such as bulldozers, dump trucks, and road rollers have had to stay idle. This directly affects the core technical standards of the expressway: Rough volume (K95) reached 60%: The roadbed earthwork work to achieve basic density K95 has completed 60% of the volume, showing that the project has created the basic route shape. K98 bottleneck only reached 12%: The volume of earth filling reaching K98 density (high standard, applied to load-bearing foundation layer) only reached 12%. To achieve 98% density, the contractor must control the soil moisture in optimal conditions, which is almost impossible when the construction site is submerged in mud. The Director of the Trungnam E&C Executive Board (currently constructing package 18) said: “The soil cannot be filled. We still let our workers focus on the bridge part, but the persistent rain has slowed down the work. Focus on installing overpass girders Faced with the difficulties of the roadbed, the Joint Contractors of Package XL-18 proactively pivoted, focusing resources on the construction of the bridge section, which is less affected by flooding. Completion of Abutments: The construction units have completed the entire body and cap beam of the abutments. This superstructure is a solid foundation, given priority to ensure the uniformity of the project. Offset Production by Bridge Girders: The work of installing viaduct girders is being accelerated, having completed the installation of 9 out of 42 girder slabs, reaching

The Châu Doc – Can Tho – Soc Trang Expressway, package XL 02, Trungnam E&C has achieved 90% progress on the bridge section, with the road section accelerating. Expediting Construction Progress in September 2025 As of September 2025, a representative from Trungnam E&C stated that a significant volume of work has been completed. The company is adhering to the committed construction schedule, with the goal of completing the entire scope of responsibility. The total production value (TPV) achieved is approximately 42.42% of the total contract value. Bridge Items: All 12/12 bridges have been simultaneously deployed. In particular, key items are accelerating: 04 large bridges (Xáng Nàng Mau, Hòa Mỹ, Xáng Lái Hiếu, and Hậu Giang Ba) have completed girder installation and are currently constructing the bridge deck, crossbeams, and bridge railings. The bridge section has completed 90% of the work volume according to schedule. Road Items: Focus is on treating weak subsoil using advanced technical methods: Implementing weak subsoil treatment using CDM (Cement Deep Mixing) and PVD (Prefabricated Vertical Drain) methods. Currently implementing preloading for sections where PVD has been applied, backfilling K95 sand for the main route, and constructing service roads. Ancillary Works: Simultaneously performing casting of median barriers, constructing box culverts (including weak subsoil treatment with CDM), and temporary bridges and access roads. Goal of On-Schedule Project Completion As one of Vietnam’s leading infrastructure general contractors, Trungnam E&C always prioritizes progress, quality, and construction safety. Trungnam E&C’s participation in the contractor consortium not only brings experience in managing complex projects but also ensures the application of optimal technical solutions, overcoming difficult construction conditions, from material scarcity to the challenge of weak subsoil treatment, to ensure the project is implemented on schedule and achieves the highest quality. With a determined spirit to accompany the Government in creating strategic infrastructure,

Phuoc An Bridge’s Cable Stay No. 1 Tensioning September 4, 2025 – According to the Ba Ria – Vung Tau Province Department of Transportation and Agricultural Projects Management Board and a consortium of contractors, the first cable stay tensioning ceremony for cable stay No. 1 took place at tower T38, part of package No. 39. I. Phuoc An Bridge – Connecting Ho Chi Minh City and Dong Nai Province With a total investment of nearly 4.9 trillion VND, the Phuoc An Bridge project is a key transportation infrastructure project with strategic importance for the economic development of the Southern Key Economic Region. The bridge is designed to be approximately 4.3 km long with six lanes, spanning the Thi Vai River to connect Ho Chi Minh City with Dong Nai Province. Once completed, the Phuoc An Bridge will be crucial, directly connecting the Cai Mep – Thi Vai port system, one of the largest port clusters in the country, to the Ben Luc – Long Thanh Expressway. This will significantly reduce the distance and time for freight transport, lower logistics costs, and promote the regional supply chain, thereby enhancing the competitiveness of the entire Southern region. As the key contractor for Package XL-39 – the main cable-stayed bridge, Trungnam E&C has demonstrated professionalism and superior experience in managing and coordinating complex construction items. II. Tensioning Cable Stay No. 1: A Challenging Technical Milestone 1. The Importance of Cable Stays Cable stays are a core structural element, playing the most crucial role in the structural system of a cable-stayed bridge. Instead of relying solely on the bridge deck to bear the load, cable stays distribute the deck’s load to the cable bundles and transfer the tensile force to the main towers. The successful tensioning of the cable bundles is not just a