This is traditionally used in Chinese spiritual traditions to propitiate and communicate with spirits. The theory is that by burning special paper, messages are reliably sent to the spirit realm. Thousands of varieties of mystical paper (also called Joss, Fu, Paper Horse, or Spirit Money paper, among other names) exist, many very beautiful and magically powerful. Some, although not all, feature images of spirits. Spirit money, which resembles cash bills, is relatively easy to find in stores catering to traditional Asian clientele (or to tourists in Chinatown). Joss paper is also sold among scrapbooking supplies. Some spirits prefer paper offerings in the forms of dresses, cars, or other material goods. (See: T’ai Shan, Lady of; Weaving Maiden.)