Don't you need a real sun to tell your fortune

Of course not. You know, the eight-character numerology method that people are studying now was invented by the ancients. They use the sun time, while modern people use Beijing time only for convenience and overall management.

This has nothing to do with keeping pace with the times.

I remember that Germany left a secret document after its defeat, which experts all over the world could not crack. It has been cracked by modern computers. Why can't you crack it?

Later, a man cracked this confidential document with a computer in the 1940s.

Now people's science and technology are indeed developed, but why should we study the Zhouyi and numerology invented by the ancients?