1. Find the web page of your paper. There are periodicals and time in the red box on the right. Click on it, and you will see the page of this volume.

2. Pull it down and divide it into two covers, a cover picture and a back cover picture. Click the PDF button under the front cover picture and the back cover picture to download.

3. There is problem information under the back cover. Click the following PDF: The previous page introduces the editor-in-chief and editorial board of this journal. The following is the article table of contents of this volume report. Click the download button to download it.