To check the message, after logging in with your own account, press the mail mark at the top right of the home page or go to the message list by clicking on "Message" on your page. After that, enter a corresponding message thread and confirm the message. If there are new messages, unread messages will be displayed.
A message can be sent by clicking on a "▶" button in the message thread. When a new message arrives or an offer is made, a mail will also be sent to the email address you registered.