You don't have to buy a diamond ring to get married. Whether to buy a diamond ring for marriage is generally determined by the wishes of both parties and local customs. If the conditions of both parties are better, the woman has a demand for a diamond ring, and the local custom is that the wedding needs a diamond ring, it can choose to buy. If the conditions are not allowed, the two sides do not have much demand for diamond rings, and there is no requirement for diamond rings in local customs, you can only buy wedding rings, and diamond rings do not need to be purchased.