Friend, many netizens said that there would be a crash when they returned to the factory. What are the advantages and disadvantages? Please tell me. Thank you.

I used to use 6000HDV, but it crashed in a few days and I couldn't turn it on for a year. I went back to the factory for a month and got it back. I've used it for half a year now, and I feel that the cost performance of Ainuo's products is quite good. The new model is not clear. I think you can consider other 8000 or 9000 models. You can't guarantee any brand. This is just a question of probability.