If I can meet a real person. . Remember to bring their photo album or something you want her/him to sign when you meet or pick up the plane. Usually, they will sign it for you.
If you want to get an autograph at the signing ceremony. Before the signing ceremony, you should go to the support club or official website, a brokerage company and other places to apply for a number plate. You will usually be asked to buy an album and then give a number plate. ) After the activity starts, only people with number plates can sign the stars with photo albums. . It still depends on the arrangement of the company. (Maybe every star has a different way. . For reference only. . . )
Oh! . . Is it detailed enough? . . .