How to include one visualforce page within another?

<apex:page sidebar="false" id="TestPage">
    <p>Inner Visualforce Page Before</p>
        <apex:include pagename="TestChart"></apex:include>
    <p>Inner Visualforce Page After</p>
</apex:page>

Note: Here in above sample visualforce page “TestPage” is the main page and “TestChart” is another visulaforce page within “Testpage”.