1. Social media platform: Search for related concert ticketing groups on social media platforms, such as WeChat group, QQ group and Weibo group. You can use keywords such as "concert ticketing first-hand group" and "concert ticketing exchange group" to search to see if there are related groups.

2. Online forums and communities: Participate in online forums and communities related to music or concerts, such as Post Bar, Zhihu and Douban Group. On these platforms, you can post or search related posts and ask if anyone knows about the existence of concert ticketing groups.