1. fitness equipment stores: there are many fitness equipment stores in Changshu city. You can go to the local fitness equipment store and ask if there are any dances sold in elastic belt.

2. E-commerce platforms: Taobao, JD.COM and other e-commerce platforms also have many sellers selling dance elastic belt. You can search online for sellers in Changshu or related dance fitness products.

3. Dance training institutions: Many dance training institutions in Changshu will provide sales services for dance supplies. You can contact the local dance training institution and ask if there is a purchase channel for Dance elastic belt.

Please note that when buying Dance elastic belt, it is recommended to choose products with good quality and reasonable price, and purchase them through formal channels to ensure the safety and reliability of the products.