It means that the purity of gold is 999 per thousand. Laofengxiang V pure gold 999, also known as thousands of pure gold, is an advertising gimmick with a purity of 999 per thousand pure gold. Laofengxiang V Jinjin999 is a product of Laofengxiang Company, which is a century-old national brand and a famous jewelry brand in China. It was established in 1848 Laofengxiang Jewelry Store.