You can go to the big recruitment websites to check their information, such as Zhaopin Recruitment, Carefree Future, Chinese Talents and so on. If there is no website and address, 80% is a liar company. If you don't feel at ease, you can go by yourself, and the fancy things will be ruined. And you can go to the local industry and commerce to check his grade number, if not, it is a leather bag company.
I hope to take my advice, and I also hope that you can find an ideal job, strengthen your awareness of self-protection and prevent swindlers from succeeding.