This is still for training. You can operate with a little hands-on ability. There are many tutorials online. It's simple. If you have tools, you can have an oven. The oven costs about 2000 yuan, and the tools cost several hundred yuan. Cold glue potion is not expensive. The lens is a profitable business from 100 yuan. After modification, the lighting capacity of the car lamp has been improved by nearly 3 times. Even if the original lamp doesn't work, you can replace it.