【PIN】Bugs

I found that the online images on the blog cannot be displayed properly on the website. I uploaded the PDF version of my blog in the ./Posts_PDF folder for everyone to better read the text and images. 我发现博客的在线图片在网站中无法正常显示。我在./Posts_PDF文件夹下上传了博客的PDF版，方便大家更好的阅读图文。