1. Social media: interact with Chen through her official social media account, leave a message or send a private letter under the post to express support, and politely ask for signature.

2. Activities and competitions: Pay attention to the sports events, activities or signing parties that Chen participated in. On these occasions, I have the opportunity to meet Chen personally and get an autograph, know the time, place and related information of the event in advance, and prepare related items (such as photos, jerseys or posters) for signature.