wc hooks how to deal ?

Hi

I drop wc hooks component on new order email template then i choose woocommerce_email_order_meta hook

After that i add test snippet like this

add_action( 'woocommerce_email_order_meta','date_email_list()',6);
function date_email_list() {
	print( '<br>---TEST---<br>'  );
	print( "<br><br>" );
}

But there is no reaction in preview and test email

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