I have built a static blog using hexo+github pages these days. The code blocks of previous blog posts can be displayed normally, but when I write it today, I find that the code blocks written by markdown cannot be rendered. The code in the md file is:

:

markdown syntax are not recognized, line breaks are tried, spaces are invalid, and cache refreshing has been tried. And even if these two code blocks are normal, the previous code blocks do not appear to be normal again.