In Changzhou, Jiangsu, you can buy anti-skid chains in the following ways:

1. Physical store: You can buy anti-skid chains at vehicle dealers or third-party physical stores selling auto supplies. These stores usually have a variety of anti-skid chains for you to choose from.

2. E-commerce platform: You can also choose to buy on e-commerce platforms, such as JD.com, Taobao, Pinduoduo, Suning.com, etc. On these platforms, you can usually find official self-operated stores and buy branded genuine anti-skid chains.

Anti-skid chains are generally made of steel chains or rubber chains, and have anti-skid functions. They are essential automotive safety products in winter, especially in ice and snow weather in the north. When choosing anti-skid chains, you can consider your own car model and needs and choose the right type.