Introduction to the Silver Defending Room: The Silver Defending Room is the place where the old Xianggong teaches the young Xianggong the secrets and experience of silver defying, as well as the use of money to make quick decisions and handle large-scale accounting procedures. Inside is a group of small wax figures of characters, which provide viewers with Recreate the scene at that time. It is the Kang family's secret to distinguish the authenticity of gold and silver in the big account. We can mainly start from the following aspects: first, color observation, second, weighing, and third, casting technology.