The upgrading for vessels can be applied to frigate, patrol boat, landing craft and other kinds of ships, improving the protection of all important parts on deck, including bridge, command center, communication systems, weapon systems, ammunition cabin and etc. The use of light advanced composite materials can enable the weight to reduce by 35% - 50% compared to the steel plate at the same level, that allow the stability and speed of sail. According to the protection requirements, Double Stars will offer flexible and optimized armor upgrading solutions to facilitate the installation procedure that adapt to navigation environments. The armoring materials applied in the upgrading solution are usually waterproof, anti-uv, anti-shock and corrosion-resistant properties.