Excuse me why the last data that pops up in the alert is from the parent scope

The result of clicking to execute the say method of the subdomain

The code is as follows:

<p ng-app="myModule">
    <h3>请分别修改父、子作用域表单里的值</h3>
    <p ng-controller="myController">
        父作用域：<br/>
        <input type="text" ng-model="name" /><br/>
        <input type="text" ng-model="sex" /><br/>
        <input type="button" ng-click="say()" value="点击执行父域的say方法" /><br/>
        子作用域：<br/>
        <my-directive my-name="{{name}}" my-sex="sex" get-name='say()'></my-directive><br/>
    </p>

</p>
<script src="../angular-1.5.8/angular.js"></script>
<script type="text/javascript">
    var myModule = angular.module("myModule", []);
    myModule.controller("myController", ['$scope', function($scope){
        $scope.name = "wangmeijian";
        $scope.sex = "boy";
        $scope.say = function(){
            alert( $scope.name +" is a"+ $scope.sex )
        }
    }])
    myModule.directive("myDirective", function(){
        return {
            restrict: "EA",
            scope: {
                myName: "@",
                mySex: "=",
                getName: "&"
            },
            template: "<input type='text' ng-model='myName' /><br/>"+
            "<input type='text' ng-model='mySex' /><br/>"+
            "<input type='button' ng-click='getName()' value='点击执行子域的say方法' />",
        }
    })

</script>