Cao Xueqin's classic poem shows that life is empty ... everything in a dream of red mansions. What are the middle two sentences?

Form is emptiness, and emptiness is form.

"Prajna Paramita Heart Sutra": After a long time of observing Bodhisattva, I went deep into Prajna Paramita, and saw that the five aggregates were empty and experienced hardships. Buddhist relics, color is empty, empty is color, color is empty, empty is color, and it is the same when you think about it. The relic is the empty phase of all laws, which is neither born nor destroyed, neither polluted nor clean, nor increased or decreased. Therefore, there is no color, no thought, no body and mind, no sound, no fragrance, no touch, no vision, even no conscious world, no ignorance, no ignorance and no old age in the air. Without suffering, Tao will be destroyed, without wisdom, there will be no gain.