Went through my resume for questions, required to explain experience for each period. No presentation needed but it might need now. No behavioral questions if I remembered clearly. Overall it is easy and simple

The company's number one ( CEO in MA?) in MA interviewed me in the hotel he lived, and one week later the directors interviewed me in the lab in MA, and then one week later again I was asked to go to the lab again to meet the team members. My hiring director told me at night HR in China would call me and give me an offer. At that night I was planning to accept an offer, however, to my surprise, HR told me they will not give me any offer. I was shocked at it.