Does anybody knows how it feels like to be a hotel intern in china?

It depends on the customers of the hotel, and the management, and the way it's run... how would YOU feel as an intern at any hotel, anywhere? Probably overwhelmed at first with all the new details and learning to deal with less-than-pleasant customers. The fact that the hotel is in China means that you'll have to know Chinese and be familiar with Chinese customs, but doesn't fundamentally change the nature of the job.