使用 Ctrl + U 或 F12 查看源代码，发现注释中的 flag ctfshow{b764ec8e-b751-4626-aab0-84e8bac8175e}

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# -*- coding: utf-8 -*-
# @Author: h1xa
# @Date:   2020-09-01 13:45:32
# @Last Modified by:   h1xa
# @Last Modified time: 2020-09-02 03:12:48
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<h3>web1:where is flag?</h3>
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