If you want to have a technical meal after learning technology, go to the repair shop. Where the technology is in the 4S shop, the manufacturer's special diagnostic computer can solve many problems. The so-called maintenance in the 4S shop is simply to replace parts. If you want to learn the real skills, you really have to go to the repair shop outside for a few years, and you have to make up your mind to study really hard. Think about it. When I was in Honda, the master was recruited from the outside repair shop, including painting and painting. Think about it.