Nowadays, there are things that want to know its solubility in ethyl acetate, and everyone wants to see it in detail. So I gathered all kinds of wise men and prepared all kinds of utensils, and I would like to take this thing and call it Pla. Pla is placed in the container containing ethyl acetate, and its change is observed. Or observe its shape and disappearance, or test the properties of its liquid, all of which are carefully done. All wise men say that if Pla gradually dissolves in ethyl acetate, observe its dissolution rate, analyze its reasons, and study the wonderful truth of Pla's dissolution in ethyl acetate. After many attempts, record its feelings in detail, and hope to get the exact number of the solubility of Pla in ethyl acetate, so that the relationship between the two can be understood, which will be used for future research.