Picture of a clothing store from the Republic of China

Quick answer：

The Republic of China period, spanning from 1912 to 1949, is characterized by a blend of traditional Chinese attire and Western influences. Clothing stores during this era would have offered a variety of garments, including cheongsam (traditional Chinese dresses), Western suits, and other fashionable attire of the time. These shops would typically be well-decorated, showcasing their goods through mannequins and displays. The interior design might reflect both Chinese and Western styles, with elements like paper lanterns, wood carvings, and European-style windows.