Good luck or ill luck.

Yang Yang, Yin Yin, Yin Yin, Good Luck and Bad Luck is an ancient divination. According to the comparison of the weather conditions in the two periods, we can infer the future weather and good luck.

Specifically, this kind of divination believes that if the day before is sunny and the day after is cloudy, it is sunny, and the situation depends on how many days have passed. If there is one day in the middle, it is the middle grid, which is the most auspicious; If there are four days in the middle, it is on the grid; If the interval is six days, it is the next case; If there is an interval of seven days, it is one day; If the interval is ten days, it is the day of harvest.

If it is cloudy the day before and the day after, it doesn't count.

It should be noted that this kind of divination can not predict the future weather and good or bad luck, but a superstition and rumor.