One can use Wu Lou in an abundance of ways around the home; these uses serve as both Feng Shui cures and enhancers. There are many symbols of longevity; one of these is Wu Lou, which can bring a profusion of blessings into the home. This special bottle gourd has been an icon of longevity, good health, and prosperity for many centuries. The Wu Lou, also known as the calabash is an important tool used in enhancing the effects of Feng Shui. The traditional of the Wu Lou started in ancient China, when gourds served the purpose of carrying water on long embarkments. In addition to simply water, medicine was also stored in the gourds; this is where the image of it as a "symbol of health, vitality and immortality " was derived. The shape itself of the Wu Lou plays an important role in its image; it is a depiction of heaven and earth unified. The top half of the gourd symbolizes heaven, and the bottom half is earth. The use of the gourd by humans indicates the harmony between earth, heaven and humanity. The Wu Lou is also said to have the ability to absorb bad chi, for the reason that Taoist monks use the gourd to incarcerate evil spirits. According to Chinese mythology, monks and deities of the Taoist belief made use of the gourd, trapping evil presences inside to prevent them from causing misdemeanour. This is where the Wu Lou got the ideology of being able to absorb negative chi in your surrounding. When a Wu Lou is being used for Feng Shui, it is imperative to attach a red thread around the "neck" to enhance its energy.