Is there always an import file in the dist file generated by mpvue running npm run dev?

Code in pages in src

<template>
    <div id="app">1234</div>
</template>

then run npm run dev to generate the dist file, but the introduction is not clear (import also reported an error), and 1234 in src does not show, do not know what is going on, find a solution

<import src="../../components/index$636dfcad" />
<template is="index$636dfcad" data="{{ ...$root["0"], $root }}"/>
Apr.02,2021
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