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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

With a total investment of 4,879 billion VND, Phuoc An Bridge plays a crucial role in connecting the Cai Mep – Thi Vai international port system with key expressways and major industrial parks in Dong Nai, Ho Chi Minh City, and Ba Ria – Vung Tau, contributing to enhancing the international competitiveness of Vietnam’s seaport system. I. Latest Construction Progress Update of Phuoc An Bridge The progress of Phuoc An Bridge is being actively implemented, with clear milestones across various packages. 1. Progress of Main Packages Package No. 38: Production value reached over 574 billion VND, equivalent to 59% of the contract value. Package No. 39 (Main cable-stayed bridge – constructed by Trungnam E&C): Trungnam E&C: Achieved cumulative production value of 547 billion VND, equivalent to 54.83% of its assigned contract value. Trung Chinh: Achieved cumulative production value of 422 billion VND, equivalent to 72.58% of its assigned contract value. Total joint venture production: Reached 969.484 billion VND, equivalent to 61.37% of the total contract value. Packages No. 40 and 41: Facing many difficulties due to obstacles in site clearance (GPMB) and a shortage of backfill materials. 2. Construction Milestones for Main Bridge Components (August 2025) Trungnam E&C is accelerating rapidly, as shown by important detailed progress: Pier T37: Completed construction of pier shaft segment D6 and is continuing with segment D7. Pier T38: Completed pouring block K8. Notably, the first cable-staying tensioning is scheduled to be implemented on August 30, 2025, a groundbreaking technical event for the project. Pier T39: Completed pouring block K6 and is continuing with block K7. Pier T40: Completed construction of pier shaft segment D6 and is continuing with segment D7. 3. Outstanding Performance of Trungnam E&C In August 2025, Trungnam E&C recorded impressive construction performance: achieving an actual production value of 16.85 billion VND,

On the morning of August 19, 2025, the Rach Mieu 2 Bridge Inauguration Ceremony successfully took place. This vital project, spanning the Tien River and connecting Dong Thap and Vinh Long provinces, marks not only a historical milestone for the transportation sector but also symbolizes the resilience, intellect, and internal strength of Vietnamese construction enterprises. I. A Historic Inauguration Ceremony and Timeless Imprint It was a meaningful day as the entire country celebrated the 80th anniversary of the August Revolution and prepared to welcome National Day on September 2nd (September 2, 1945 – September 2, 2025). The event was attended by high-ranking leaders such as Standing Deputy Prime Minister Nguyen Hoa Binh, former National Assembly Chairwoman Nguyen Thi Kim Ngan, along with leaders from the Ministry of Construction and relevant localities. The completion and inauguration of Rach Mieu 2 Bridge, approximately 5 months ahead of the initial schedule, is a proud achievement. This is a clear testament to the self-reliance of Vietnam’s construction industry, as domestic units have mastered the entire process of design, construction, and equipment manufacturing for a large-scale cable-stayed bridge project. Trungnam E&C is committed to delivering the highest value to customers, shareholders, and employees, with projects meeting high quality standards, ensuring progress and absolute safety, contributing to “Creating Sustainable Value” for Vietnam.   II. Rach Mieu 2 Bridge: A New Lifeline for Dong Thap and Vinh Long Rach Mieu 2 Bridge and its approach roads have a total length of 17.6 km, with a total investment of 6,810 billion VND from the state budget. The main bridge section is 1.97 km long, designed as a cable-stayed bridge with 112 cable bundles and two main towers reaching 116.5 m high. The main span is 270m long, the bridge deck is 21.5 m wide, with 4 mixed-use lanes and a

“The progress of the Chau Doc – Can Tho – Soc Trang Expressway is accelerating, with Trungnam E&C achieving a breakthrough 39% completion, finishing the girder installation of Xang Lai Hieu Bridge, overcoming the ‘sand shortage’ to bring the project to fruition on schedule.” I. Project Overview The Chau Doc – Can Tho – Soc Trang Expressway (Phase 1) project is a strategic expressway connecting the Mekong Delta. Upon completion, it will reduce transportation time, boost logistics, and promote regional economic development. In the Hau Giang section, Trungnam E&C is undertaking many key construction items — the overall package progress in Hau Giang reached 39% as of August 2025. Total length: 188.2 km, passing through 4 provinces and cities: An Giang, Can Tho, Hau Giang, and Soc Trang. Scale: 4 lanes, design speed 100 km/h. Total investment: 44,700 billion VND. Commencement date: November 2023. Completion target: Expected to complete the entire route in 2026 and put into synchronous operation in 2027. The project is divided into 4 independent sub-projects, each managed by a local authority, ensuring coordination and specialization in implementation. II. Rapid Progress of Bridge Construction Items. Trungnam E&C is the leading contractor in the joint venture constructing Package No. 02 (section from Km113+200 – Km131+082) and Package No. 09 (section from Km131+300 – Km144+500) belonging to Sub-projects 3 and 4. With the spirit of “overcoming sun, winning rain” of the Trungnam E&C team, the work continues to blaze on the construction site. Main construction items of Trungnam E&C: Road section: Excavation of unsuitable soil. Sand embankment for service roads/temporary roads/main route. Weak ground treatment: CDM (Cement Deep Mixing)/PVD (prefabricated vertical drains) combined with preloading. Box culvert construction. Bridge section: Xang Nang Mau Bridge (XNM): Currently constructing cross beams, deck slabs. Hoa My Bridge: Girder installation completed, currently constructing cross beams, deck slabs and bridge railings. Xang Lai Hieu Bridge: Girder installation completed, currently constructing cross