Thank you for your advice.
The previous problem has been solved, I deleted the Intermediate folder (and then regenerated the VS files) in order to solve another problem(solutions from google). this caused the project to fail to compile. I tried Google but did not solve it. Because I have been writing for about 2 months. it is very troublesome to rewrite a new one, this makes me fell so bad to raise this question.
I should be more understanding and patient, as you said, everyone makes mistakes, especially a large team with large amount of people. Thank you very much for your earnest answer(Indeed, this is the only answer I got). I have learned a very important lesson and will be more mature and calm attitude to any problem I meet.
I am not joking on Yusuf’s answer, my English is not good enough to express exactly what I want to say, maybe I should use earnest instead of serious, and " I believe that the game you described should be a good game" means exactly I believe that may be a good game.
In Chinese, I wan’t to say, 很感谢你认真的回答, 我相信你说的游戏应该是个好游戏吧(但是游戏引擎确实很不易用). it’s not a mock word.
I should post my problem even if no one answers, better than make fun of engine name, witch has no meaning with the problem.
You are a gentleman, kind and helpful, appreciate you.