In addition, I actually believe that people will travel abroad when they are asleep. I am a very accurate dreamer. Many times, I have never been to that dreamland before, but later I will find that place in that dream.
As for how many days the omen is, I doubt it. I think everyone's situation is different. I'm about three months, just like divination, which means 100 days.
Personally, I suggest that you don't trust Duke Zhou completely, have a little impression, and then do what you should do, let nature take its course and good luck will come naturally.