The interview process was actually quite courteous.
Conclusion: My offer was suddenly canceled!!!
Process: I was ultimately successfully hired after the interview and received an offer. Both parties also confirmed the start date, so I immediately went to the designated hospital to undergo a self-paid medical examination. I also put my other job-search plans on hold and canceled other interview appointments or invitations.
However, a few days before my start date, the company suddenly called to cancel my offer. I was completely at a loss. Not only did this disrupt my original plans, but I also incurred many tangible and intangible costs. In the end, I could only start my job search from scratch. Some companies even became inaccessible when I later tried to request interviews again, because I had previously turned down their interview arrangements.
After thinking it over repeatedly recently, I decided to share this experience publicly after all. I hope everyone can be careful and cautious when looking for a job.