There are many ways to do this, some are free and some are expensive. . .
The signed photo can be a real signature or a copy, so make sure before you buy it.
First, you can go shopping on Taobao, mostly copying.
Second, you can attend the signing ceremony in Jie Jun. A new album has been released recently, and a signing ceremony is being held in the mainland.
Third, you can draw signature photos through some lottery activities or magazines. Advertisement: BlingBling is a magazine specially made for groupies, and you can get rewards through some of the above activities. I have been subscribing to this magazine?
Fourth, I can get it for you through acquaintances or other paths (which I usually do)
Fifth, the bookstore near you should have posters selling Jie Jun, which are usually signed by stars.
You can use it, but these should be known to every fan.