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In the early hours of December 13, with the final batch of concrete poured, after 10 hours and 45 minutes of continuous pouring totaling 1,278 cubic meters, the first layer of the outer wall of Storage Tank No. 3 in Phase III of CNOOC’s Ningbo “Green Energy Hub” project was successfully constructed. This marks the transition of China National Offshore Oil Corporation’s first 270,000-cubic-meter “ground-mounted” LNG storage tank project from horizontal construction to vertical construction, laying a solid foundation for achieving the goal of gas lifting of the tank. The Phase 3 project of Ningbo’s “Green Energy Port” is located in Beilun District, Ningbo City, Zhejiang Province. It is a key project related to oil and gas infrastructure, and it involves the construction of 6 LNG storage tanks with a capacity of 270,000 cubic meters each, along with associated facilities. The outer wall of Tank No. 3, which is being poured this time, is constructed of prestressed concrete. The total height of the wall is 50.8 meters, and it is poured in 13 layers; the height of the first layer is 4 meters. The walls from the first layer to the second layer feature a variable cross-section, with thicknesses ranging from 0.9 meters to 1.2 meters. Additionally, the pouring of the tank’s walls took place during winter, when night temperatures were low, which posed challenges for the construction process. To ensure project quality, the storage tank project team for Ningbo’s “Green Energy Port” worked together with the supervisor, general contractor, and construction units to analyze the conditions for wall pouring. A detailed construction plan for the first floor walls as well as a winter construction plan were developed. Managers from all participating units and on-site construction teams were briefed on safety procedures, resulting in a \"four-fix\" management system for on-site construction that involved defining specific areas, responsible persons, responsibilities, and tasks. This system ensured comprehensive quality and safety control at each work site, thereby enabling the high-quality completion of the pouring of the first floor walls of Tank No. 3.