# Hello World

$$
i \hbar \frac{\partial}{\partial t} \psi(\mathbf{r}, t) = H \psi(\mathbf{r}, t)
$$




测试加入图片


![4.png](/static/img/3d38958ecaa7a45010b05782750c5ed9.4.webp)

测试加入视频


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    allow="autoplay; fullscreen"
    allowfullscreen
  ></iframe>
</div>

<div style="position:relative; padding-bottom:56.25%; height:0; overflow:hidden;">
  <iframe
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    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; fullscreen"
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Hello World