How to build border and coastal defense according to the requirements of war: Due to geographical and historical reasons, the development of border and coastal defense areas is generally backward. Correctly understand the investment tilt policy of coastal defense construction, and consider the gap between developed and backward areas, areas with good environment and hard and remote areas as a whole. It is necessary to formulate policies and measures to adapt to coastal defense construction in different directions, and give necessary tilt in capital and material investment according to different situations. Pay attention to the leverage of the state's policy support and inclined investment in border defense construction, take advantage of the state's advantages in policies, funds and materials, mobilize military and local forces, revitalize border defense resources, and enhance border defense control capabilities in the role of policy support.