LS4000-S is a domestic dual-core department-level 2U rack server product. It adopts the latest domestic high-performance Loongson 3B4000 core processor with a core working frequency of 1.8GHz. LS4000-S server provides 8 DDR4 memory slots, 8 3.5 SATA hard disk interfaces, 2 2.5-inch SATA hard disk interfaces, PCIE x8 slots (compatible with x16 devices) * 2, PCIE x8 slots * 3 and 1 dedicated encryption card PCIE slot, simultaneously supports dual gigabit network transmission. Its high computing power, flexible expansion capability and high-speed network transmission capability can meet the various industry application requirements of department-level users. It can be used in data centers, network control rooms, offices and information centers.