You can buy robes in that place in Xi 'an.

In Xi, you can buy pajamas in department stores, shopping centers or specialized pajamas and underwear stores. Here are some common shopping places:

1. Large department stores, such as Xi 'an Saige International Shopping Center and Xi 'an Century Jinhua Shopping Center. These shopping malls usually have multiple brands of underwear and pajamas. You can choose multiple brands and styles of pajamas.

2. Professional underwear stores, such as Xi An Hanshu, Xi An Yuyuan and Xi An Jianlibao. These shops specialize in underwear and pajamas. There are many kinds of products, and you can find pajamas that meet your needs.

3. Online shopping platforms, such as Taobao, JD.COM and Vipshop. You can search and buy pajamas on these platforms, and there are many brands and styles for you to choose from.

I hope the above information can help you, and wish you a happy shopping!