During the interview, the whole process ran smoothly. I interviewed three interviewers in one day. On the same day, the HR immediately verbally expressed that the interviewer was satisfied with the performance, but they could only offer a salary as low as $1000. Next week, the HR said that their management rejected the proposal. The overall feeling is that you are deliberately teasing the applicant and wasting the applicant's time. If the salary budget is not enough, the applicant should not be allowed to come for the interview.