There is Lao Fengxiang on the ring, which shows that it is a century-old national brand and a famous jewelry brand in China.

The nine thousand nine hundred and ninety-nine pure gold on the ring indicates that it is all pure gold, which is equivalent to 99.99% gold purity.

If it is pure gold, the standard gold is 999, which is equivalent to 99.9% gold purity.

Extended data

The Regulation on Supervision and Naming of Precious Metals in Jewelry 1 which has been implemented since May 4th, 20 16 is amended:

4. 1 purity is the lowest value, and there should be no negative tolerance.

Note1:"zu (gold, platinum, palladium, silver)" is the highest purity of jewelry products specified in this standard, that is, its precious metal content is not less than 990‰.

4.2 The purity of accessories materials should be consistent with the main body. Due to the need of strength and elasticity, the accessory materials shall meet the following requirements:

4.2. 1 Gold ornaments with a gold content of not less than 9 16‰(22K) shall have a gold content of not less than 900‰.

References:

Baidu Encyclopedia-Purity Rules and Naming Methods of Precious Metals in Jewelry