Carving "thousands of gold" on the back of gold inlaid jade means that the metal part of this gold inlaid jade is thousands of gold, that is, gold with a gold content of 99.9%. This lettering behavior is to show the gold content of gold inlaid jade, and also to show the value of this gold inlaid jade.

But if the gold inlaid jade is fake, the words "thousands of gold" may also be engraved on the back. It is necessary to identify the authenticity of gold inlaid jade. There are many ways to identify the authenticity of gold inlaid jade, including observing its color, weight, hardness and so on. And it can also be tested by authoritative jewelry testing institutions. If it is found that the gold inlaid jade is fake after testing, the "thousands of gold" engraved on the back will have no meaning.

In short, the gold inlaid jade engraved with "thousands of gold" on the back is not necessarily true, so it is necessary to identify the authenticity of the gold inlaid jade.