Now, let's enter the first step of the tutorial: setting the time attribute of the file.

Baidu takes a look at Nandake dbkaos in the morning, click to enter the station, and set the creation time and modification time of the pdf you need to modify.

Need to be reminded that the website provides two modification modes:

One is "fixed mode", which will change the creation time of all uploaded PDFs to the same time point and change the modification time of all PDFs to the same time point;

The other is "random mode". After setting the time range, all pdf creation times will be randomly modified to different time points in the time range, and all pdf modification times will be randomly modified to different time points in the time range.