It can be distinguished by labels and trademarks, quality and workmanship.

1. Labels and trademarks: First check the labels and trademarks on the clothes. Clothes made in Vietnam are usually marked "Made in Vietnam" or "Vietnam".

2. Quality and craftsmanship: Vietnam has a well-developed manufacturing industry, and clothes made in Vietnam usually have certain guarantees in terms of quality and craftsmanship. You can observe the details of the clothes, such as whether the stitching, buttons, zippers, etc. are fine and whether there are obvious flaws.