1. Shopping malls in Beijing, such as Wangfujing Department Store and Beijing Department Store, all sell men's Tang suits. There are many brands and styles to choose from, and the quality and after-sales service are also guaranteed.

2. Some specialized Tang suit brands also have their own stores in Beijing, such as Hengyuanxiang and Youngor, which can be customized according to personal preferences and needs.

3. Online platforms, such as Taobao and JD.COM, also have many men's Tang suits for sale. The prices are relatively low, but they need to bear certain risks.