Uncle Wen has 20 years experience in underwear industry, and started to establish Kaiwei Company in Hong Kong in 2004. Since its establishment, Uncle Wen has been focusing on product research and development, and has owned many patented inventions so far. At the beginning of 2020, when fighting the COVID-19 epidemic in Wuhan, a female medical worker could not change sanitary napkins in time because of wearing protective clothing for a long time, resulting in menstrual blood red in protective clothing. This incident deeply touched Uncle Wen. Decided to use their own expertise and resources to develop a black underwear that can replace sanitary napkins and solve the physiological problems of women around the world. After nearly 26 months of research and development, 10 product iterations, and 1000+ days of user experience, secret companion pants have begun to take shape and gradually take shape.