What does fortuneteller Shou Yuan mean by forty-nine?

I can only live to be 49 years old. This is for reference only, not to be trusted.

People's life and death cannot be broken, because people's own initiative is the biggest external force to improve numerology, so some things are doomed, but they are not static, so no one who studies mathematics can judge life and death, because it is impossible to be accurate. People are more complicated, innate things will change with people's cultivation, knowledge and mentality, and the active efforts of people the day after tomorrow will change innate numerology.