You can ask the stars online if they are willing to sell it, but they will definitely not sell it. You can buy books or albums signed by Zhang Jie. However, I still recommend that you go to an album or book signing event to buy it. There are a lot of fake things online. It seems that people often win prizes and get stuff about Zhang Jie on Weibo. You can check it out. PS: In fact, every star hopes to get Zhang Jie's autograph, but at the same time, there are also many stars who have not received Zhang Jie's signature. But so what, if it is a real star, even if there is no signature from Zhang Jie, you will always love him. You can let your sister get into a good school and rely on your own efforts to go to Zhang Jie's concert or autograph session. Wouldn't it be more meaningful to get Zhang Jie's signature? Loving Zhang Jie and seeing him healthy and happy is enough. I'm sure your sister thinks the same way I do.