Li Lin used to live in a poor village in the north of China . In the 1986 , he went to Shenzhen to make a living with his wife. Years later,they became rich and returned to their hometown . To their surprise,the land around the village was covered with sand . That made them feel sad . After thinking carefully , Li and his wife made up their minds to fight against the sands. They bought thousands of young trees and planted them around the village . Ho w ever,only a few survived( 存活 ), because the trees were not regularly watered . But how to get water was a big problem . They dug a w e l l( 井 ) but it became dry soon . Then they asked a drilling team to dig a deep well . Clear water appeared,but their money was used up . They couldn't afford to buy young trees . They went to several banks for help but got nothing . Finally they turned to a friend who was also from the village . The friend had a big business . Learning what they were doing,their friend was moved and decided to do something for their village,too . So he offered the money they needed. With the money , they bought trees and had them planted . They looked after the trees as if they were their own children . After some time,green leaves came out . When the villagers saw the changes,some started to join Li and his wife in the fight . Then more joined . Years went by . And now larger areas around the village are covered with green trees .