Laofengxiang brand. Lao Fengxiang's jewelry marked SW is pure gold, and Lao Fengxiang's pure gold is gold with a gold content of more than 99%. Among them, S Lao Fengxiang stands for brand name, W stands for manufacturer, and pure gold stands for gold purity of 99.9%, which can also be called thousands of pure gold. Lao Fengxiang's business scope is relatively wide, generally including platinum and gold.