这个报错是什么意思啊？

这个报错是什么意思啊？ Exception in thread "main" java.lang.Error: Unresolved compilation problem: The type Chinese must implement the inherited abstract method IJiekou.play() at com.imooc.Chinese.play(Chinese.java:3) at com.imooc.Test.main(Test.java:13)

代码：

package com.imooc;

public class Chinese extends APerson implements IJiekou {

public void paly(){

System.out.println("人类都喜欢玩耍");

}

public void say(){

System.out.println("中国人说中国话");

}

}