Beianshi is a brand of Sichuan AIA Enterprise, focusing on disposable underwear, bed sheets, toilet mats and other outdoor disposable hygiene products. AIA and David's development trajectory is very similar, through the accumulation of experience in manufacturing medical supplies in the early days, and grasp the market of disposable hygiene products. AIA has a well-established production and quality inspection system, and is the first enterprise in Southwest China to pass the GMP medical device quality management system certification, and is also a member unit of the National Health Enterprise Association of the Ministry of Health. Its disposable products are sold in supermarket chains such as Ito-Yokado and Wal-Mart, and at the same time supply medical disposable products to Sichuan Provincial People's Hospital, West China Hospital, Chengdu Military General Hospital, etc.
 
Most disposable panties are pure white in color, and the appearance is similar and unrecognizable. Bei Anshi has put more thought into the style design, and its underwear can be selected in many colors, and even has a colorful stripe pattern, which will not be monotonous and rigid. There is no special maternity size for the disposable underwear of Bei'anshi, but its size range is larger, and it can be purchased for ordinary or pregnant women.
 
Bei'anshi's portable sterile cotton underwear is different from the common 100% cotton material, the fabric is a blend of pure cotton and Lycra, the fabric elasticity, comfort and abrasion resistance will be better, close to the texture of affordable ordinary underwear. The women's model is a common brief, and the men's model is a boxer brief, and the price of a single piece is close to 7 yuan, which is more suitable for consumers who have frequent replacement needs in the short term and have sufficient budgets.