By taking the 22 barren hills for suitable afforestation in the Yuntai Mountains of Lianyungang City as the research object

16 site factors were selected and divided into macroscopic and microcosmic factors to conduct site quality classification and assessment

respectively. In the end

the classification and assessment results were combined. Results are as follows: The 22 hills could be divided into five types. The main features of the first type

consisting of 2 hills

had a medium or superior thickness of soil layer

relatively fine site quality of macroscopic factor and medium soil quality; the second type

consisting of 4 hills

a medium or superior thickness of soil layer

relatively fine site quality of macroscopic factor and poor soil quality; the third type

consisting of 7 hills

a medium or inferior thickness of soil layer

relatively medium site quality of macroscopic factor and medium soil quality; the fourth type

consisting of 7 hills

a medium or inferior thickness of soil layer

relatively medium site quality of macroscopic factor and poor soil quality; and the fifth type

consisting of 2 hills

a very thin thickness of soil layer

relatively very poor site quality of macroscopic factor and medium soil quality. In summary

the site quality in the research area is not fine as a whole

and afforestation will be very difficult in the future.