Today, I went to the store of lishuiqiao Oriental Beauty, and said that the training would be free for two weeks, but I would have to pay 800 yuan back every month in the later period. Is it reliable?

I don't think these paid trainings are very reliable. If a formal company really has the sincerity to recruit people to work, even newcomers will unconditionally teach them the skills they need for their jobs. If they need money for training, they may dismiss you for various reasons after receiving the training fee, and then you will draw water with nothing, wasting time and money. So you have to think twice.