Underwear, also known as tights or pantyhose, is tightly wrapped from the waist to the feet. At present, most pantyhose are designed for women, and some are worn by men. Like stockings, there are many materials, such as cotton, nylon and wool blends. Panties appeared in 1960' s and became another optional lower body clothing form of stockings. Pantyhose designed for women are generally positioned to show the beauty of women's feet, while pantyhose designed for men generally do not have this point.

Langsha Group, founded in 1995, is the only enterprise that owns "China well-known trademark", "China famous brand product" and "national inspection-free product" at the same time. And among underwear enterprises, it is the only "industry landmark product" and "the first underwear enterprise in China". Now it has seven branches and fifteen sales companies, including Lanfeng Hosiery, Hong Guang Knitting, Lifu Textile and Langsha Real Estate. Two subsidiaries of Sichuan Langsha and Anhui Langsha and five overseas trading companies have become the largest brand manufacturers in the industry, and are known as "two firsts", "four firsts" and "ten firsts".