1, white is a color, which represents the brightest color in the spectrum, and usually symbolizes purity, freshness and elegance. Drawing lots means randomly drawing one or more items from a pile. Such as "lottery", "lottery", "sampling" and so on. A number means a single number in a number, for example, "1, No.2, No.3 ..."
2. "Self-opening number" is a term in the lottery industry, which is usually used to refer to the way buyers choose their own numbers when buying lottery tickets.