Does the pool of green water at the end of the banquet mean anything? Who pulled out that dagger? Why did you throw it into the swimming pool?

"The water is clear and transparent, and the blood on the sword is red. Just like alizarin red, clear water washes away desire, but the water is also polluted. The existence of desire pollutes the whole world. "

This means pool water, I agree. Let me explain the meaning of the green thing floating on it. In ancient times, there was no running water, and people drank well water, even the palace was no exception. Well water reaches the ground, some wells are deep and the water is very cold. If the water is swallowed immediately, it will be very harmful to the body. The ancients were very clever. In order to prevent some people who don't know this well water from drinking in a hurry, a lot of bran was sprinkled in the well water. In this way, people should blow off the bran before drinking it, so that they won't get sick. A tradition has been formed for a long time, and I guess it was mentioned and beautified at the night banquet.