Dana and 5 1test are entry-level. . Many can only be regarded as entering the industry after training there. Personally, I think I can teach myself, and it's easier to get into the business by going to the forum. There is no need to attend training. Some online tutorial videos are also available, and of course, you can also participate in the open class of road training, which is free anyway. You can choose training according to your own needs after entering the business.