Third-tier brands. Qiwu Zhilian brand focuses on the research and development and production of "healthy, body-beautifying, generous and comfortable" adjustable underwear. It uses novel special equipment to produce one-time molded underwear. The price of Qiwu Zhilian underwear ranges from 40 yuan to 80 yuan, which is in line with the standards of third-tier underwear. Standard and third-tier underwear are divided according to price: first-tier prices range from 150 to 300. The second-tier price range is 90 to 150, and the third-tier price range is 40 to 90. Qiwu Zhilian Underwear Store, established in 2023, is located in Zhuzhou City, Hunan Province. It is an enterprise mainly engaged in the textile industry.