My buddy has been working at the company for five years, finally got a salary increase from 8,000 to 15,000.

He was so happy that he treated us to a barbecue, which cost 800.
The next day, during the company health checkup, he was diagnosed with kidney failure.
A kidney transplant and post-surgery anti-rejection treatment are estimated to cost 600k.
He told me, "If I had known, I wouldn't have asked for a raise; if I hadn't asked for a raise, I wouldn't have gone for the checkup,
if I hadn't gone for the checkup, I wouldn't have known I was sick, and if I didn't know I was sick, I could still be happy for a few more days."
I said, "But the illness is still there."