I have been there before. Tell me about my experience. The first interview was with the branch manager. Just ask some knowledge about mechanical hydraulics. Then I asked you if you can bear hardships and adapt to the 24-hour standby work system. Then you can go back and wait for the notice. If you pass, I will call you for quality evaluation (this is not difficult, just choose) and I will inform you twice a week or so. This is a video interview, and the HR at headquarters will interview you without asking any technical questions. Just don't be timid, and then if you get a call within two weeks, you will be ruled to go to Changsha Zhonglian headquarters for training. It doesn't matter if you have no experience, everything will be systematically studied there. A colleague of mine used to be an accounting major, but now he is doing well.