According to Baidu Encyclopedia, RUWENSWAN/ Rukish Black Swan trademark is a brand with national intellectual property certification. Its founder Ji is mainly engaged in commodity services, including clothing, body-shaping underwear, finished clothing, underwear, socks, shoes, swimsuits, hats and scarves. The design process is different from the traditional method of setting bra size according to cup size. For example, the clothing size (S, M, L, XL) adopted in Kissing the Black Swan redefines the wearing attribute of underwear. Each product matches the corresponding fabric. Many products contain Lycra ingredients, and new liquid lycra fabric has been added. Bring a better product experience to consumers. For example, the brand purpose of Kissing Black Swan is to restore the most comfortable health experience of women, pursue its simple form and function, and give people natural experience and perception. From the use of fabrics and its brand purpose, it can be seen that the quality and comfort of its underwear are acceptable and easy to wear.