China Naming Network - Weather knowledge - The weather here is sunny and rainy.
The weather here is sunny and rainy.
9 days
If you live x days, you will have x mornings and x afternoons.
There are X-5 rainy afternoons and X-6 rainy mornings.
So (X-5)+(X-6)=7.
Then X=9.
Because the total rain in the morning and afternoon is seven times ~