C420 I'll Give You Justice

Although Lin Changxin wasn't an expert in researching gold and jewelry, he had seen a lot of things. How could he not tell the authenticity of a piece of gold?

"Then how do you want to verify it?" Lin Changxin asked.

Yang Chen took the piece of gold and said, "If the stone can be turned into gold, then gold is worthless. "

The magic mage looked up at Yang Chen and said, "You can't