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On June 10, 2021, the 29th meeting of the Standing Committee of the 13th National People's Congress passed the Hainan Free Trade Port Law of the People's Republic of China, which determined to establish and improve the Hainan Free Trade Port customs supervision special zone system with closed-off customs operations on the entire island.
With a zero-tariff system fundamentally in place after the independent customs operation, high-quality global resources can flow into Hainan with greater freedom and efficiency, Wu said. Trade liberalization and facilitation are defining features of a free trade port.
Looking ahead, the Hainan FTP will prioritize promoting the free and efficient flow of key production factors, including trade, investment, cross-border capital, personnel and logistics, alongside the secure and orderly movement of data, according to Cai.
A view of the Hainan Free Trade Port in Haikou, south China's Hainan Province, July 23, 2025. /VCG A view of the Hainan Free Trade Port in Haikou, south China's Hainan Province, July 23, 2025. /VCG
A battery energy storage system (BESS), battery storage power station, battery energy grid storage (BEGS) or battery grid storage is a type of energy storage technology that uses a group of batteries in the grid to store electrical energy.
Battery storage power stations are usually composed of batteries, power conversion systems (inverters), control systems and monitoring equipment. There are a variety of battery types used, including lithium-ion, lead-acid, flow cell batteries, and others, depending on factors such as energy density, cycle life, and cost.
Grid energy storage, also known as large-scale energy storage, is a set of technologies connected to the electrical power grid that store energy for later use. These systems help balance supply and demand by storing excess electricity from variable renewables such as solar and inflexible sources like nuclear power, releasing it when needed.
Energy storage systems are devices capable of carrying out these transformations in an efficient and controlled way, allowing to better manage energy supply and demand nationwide. What is an energy storage system? An energy storage system is a device or set of devices that can store electrical energy and supply it when needed.
Compressed-air-energy storage (CAES) is a way to store energy for later use using compressed air. At a utility scale, energy generated during periods of low demand can be released during peak load periods. The first utility-scale CAES project was in the Huntorf power plant in Elsfleth, Germany, and is still operational as of 2024.
Compressed air energy storage may be stored in undersea caves in Northern Ireland. In order to achieve a near- thermodynamically-reversible process so that most of the energy is saved in the system and can be retrieved, and losses are kept negligible, a near-reversible isothermal process or an isentropic process is desired.
New compressed air energy storage concept improves the profitability of existing simple cycle, combined cycle, wind energy, and landfill gas power plants. In: Proceedings of ASME Turbo Expo 2004: Power for Land, Sea, and Air; 2004 Jun 14–17; Vienna, Austria. ASME; 2004. p. 103–10. F. He, Y. Xu, X. Zhang, C. Liu, H. Chen
A study numerically simulated an adiabatic compressed air energy storage system using packed bed thermal energy storage. The efficiency of the simulated system under continuous operation was calculated to be between 70.5% and 71%.
