At the concert in Jolin Tsai, some common products around the stars are usually very popular, such as:

1. Auxiliary items: such as light sticks, speakers, bracelets, etc. These items can add atmosphere to the concert and let fans better express their support and love.

2. Clothing accessories: including T-shirts, hats, key chains and other items with Jolin Tsai or concert logo, which can provide fans with a unique identity and make them feel closer to their idols.

3. Souvenirs: such as mugs, badges and postcards. These items can be given to friends as fans' collections or gifts, leaving them with good memories.

4. Gourmet: Some fans may like to buy some delicious food related to Jolin Tsai, such as limited-edition snacks or drinks, which can also increase the fun and uniqueness of the concert.