You can't stop Jin Shifu from stealing your gold, so you can use the above methods to prevent it from being stolen. You can go and have a look. There are three main ways to steal gold, even if you stand and stare, you can't see why! 1, aqua regia 2, inverted mold 3 and lightning hammer aqua regia 3 are a mixture of hydrochloric acid and nitric acid, which can decompose gold. This kind of stolen gold is usually stolen during cleaning. The regular cleaning liquid is hydrochloric acid, which can wash away dirt after heating, but the "dirty" gold shop will use aqua regia as hydrochloric acid to clean you. When cleaning, you should pay attention to it first. When the mold is melted and pressed, he will drop your scraps into the casting paste. The way to prevent this is to weigh once before processing, once again after the mold is inverted, and once again after processing! Lightning hammer gold, this kind of stealing gold is that when you stare at the processing, you can knock off a piece of your gold in the blink of an eye, and the way to prevent this kind of stealing gold is weighing! The above three methods should have prevented weighing, but you still ignored the cunning of the "black-hearted" shopkeeper and said it was cheating and adulteration. There is no electronic scale when you go to process, so don't use that scale or hand scale to enter. Also, don't think you are an acquaintance. He just won't steal your gold. The more familiar the better! Shops that use electronic scales should also pay attention. It is said that there is a remote control electronic scale now, so before weighing jewelry, he must first weigh it with a French code! Adulteration was after he stole your gold. In order to reach the weight, he will add silver or copper to you. Borax is a commonly used catalyst in processing. Please pay attention to see if there are any metal particles in his borax, which is used for adulteration! That's all I know. It's really hard to prevent. Even an old master with 10 years experience in playing gold can't stop processing in other people's stores. The most effective way is to measure the weight and gold content with the method mentioned in my last post before processing, and then take it for processing and measure it again after processing, so that he can steal your gold without hiding! I am an honest man. I've been in this business for 10 years and I've never done anything wrong. My hands tremble at the thought of doing such a thing. I don't like those black-hearted people who beat Jin Shifu!