The location of Haitan Island is in the sea in Fuzhou of Fujian Province. The purpose to set up the fleet of Haitan is to protect Fuzhou. In addition, after removing in order to fill in the naval base of Nanjih too, the defence space left over. The base of the fleet of Haitan is originally set up in Chentungwei. Later, move to Haitan Island first, and then move to Chentungwei. Move to Sunghsiachen afterwards. Through above-mentioned course of moving, can know the direction of the coast defence policy in Fujian of Ming Dynasty.