XiuXianGame/Assets/Editor/UIAsset/NewUXMLTemplate.uxml

<?xml version="1.0" encoding="utf-8"?>
<engine:UXML
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:engine="UnityEngine.UIElements"
    xmlns:editor="UnityEditor.UIElements"
    xsi:noNamespaceSchemaLocation="../../../UIElementsSchema/UIElements.xsd"
>
    
</engine:UXML>