Professor Lin Yao is the editor-in-chief of Mathematics Teaching in Junior Middle School. Online submissions can be sent directly to the mailbox of math@yzu.edu.cn Institute of Mathematics and sent to Mr. Yao Lin. You can also send it to their director Yao, who goes to school every day, so it's best to send it to Lin Yao, the Mathematics College of the Slender West Lake Campus of Yangzhou University.