(2017·福建中考)
No one kno ws when the first kite was made. The first record of a kite was more than 2，000 years ago in China. Han Xin, the leader of an army, wanted to bring down a king. He decided to di g a tunnel(隊道) into the king's palace. H e flew a kite over the wall of the palace to make sure the length(长度) of its string(线). In this way, he could determine how long the tunnel should be. His men in the tunnel took the kite string with them. When they reached the end of the string, they knew how to dig up.
