The sooner the better, even before he gives the notice, there are three advantages at first. First, the other party will have an impression first. If the other person doesn't know how to do it, congratulations, your resume is the standard; 2) Ensure that the other party's mailbox can receive your email; 3) When the enterprise feels that there is a shortage of people, it is unrealistic for a single person to go to the job fair, and you will be more anxious, and your opportunity will come.