Land for pretected forest on the coast has special site conditions, and site classification is the scientific basis for seaboard afforestation. The site classification system on the coast zone and islands of China, may be classified into five levels梥ite region (sub-region ) , district, class, group, and type. The land division for afforestation is carried out by the principle of environmental heterogeneity among regions on large scale, according to the difference of ail temperature, moisture and type of coast geomorphy. It may be classified into 7 legions, 12 sub-regions and 55 districts. The medium and small scaled division for site class, group and in type, subdivided in a site district, are based on medium topography, topographic climate, micro-relief and soil conditions.