The document discusses the product life cycle and marketing mix for diamond jewelry. It outlines the four stages - introduction, growth, maturity, and decline. In the introduction stage, the company will introduce 4 categories of diamond jewelry and target poor and middle income groups with easy payment plans. In the growth stage, new designs will be added and prices increased as the target market expands. In maturity, the focus will be on retaining existing customers and adding some new ones while keeping prices stable. In decline, online shopping options and discounts for loyal customers will be offered as sales decrease and competitors increase.