1. Search for WeChat group number: If you have obtained the WeChat group number of a graphic advertising store in Shenzhen, you can enter the number in the WeChat search box. If the group has no privacy, you can join the group directly.
2. Looking for WeChat group recommendations: In WeChat, you can search or browse related WeChat group recommendations through the "Group Chat" function in the "Discovery" column.
3. Search through a circle of friends or social media: If a friend or someone you know works in a print advertising shop or related industries in Shenzhen, you can ask whether there are related WeChat groups through a circle of friends or social media and try to join.