Because it was given by Jia Mu.
Jia Rong once said that Qin Keqing "he doesn't need anything else for this disease, just eat some food and drink and don't be afraid", which shows that Qin Keqing has been anorexic for a long time. Of course, it is normal to be bedridden for a long time, without exercise, and anorexia. But Qin Keqing has a "hidden affair" with Jia Zhen, and her anorexia is obviously due to psychological pressure.
Qin Keqing himself did not want to die. "Now that it is past the winter solstice, there is nothing good, or good, I don't know", this can reveal her bitter helplessness, and a strong and lucky desire to survive.
Qin Keqing's illness was a heart disease, because he felt the change in the attitude of Jia Mu's people and knew that the "hidden feelings" were exposed, and he would fall ill (the Mid-Autumn Festival feast "played with the old lady and his wife for half the night", "when he heard anything, he had to measure it for three days and five nights", "After twenty days, he felt lazier and lazier every day"). If Jia Mu could forgive her: "This child is so sick, he must know that he is wrong", as tolerant as Jia Lian: "Who is not wrong?" If you know it, you will change it", then Qin Keqing's illness will naturally be better.
The yam cake stuffed with jujube mud, without asking, must be sweet. Even if the anorexia person has an appetite, he generally likes light or spicy stimulation, and rarely has a sudden interest in sweet and greasy things. But "the old lady appreciates" gives this sweet jujube mud stuffed yam cake a different meaning.
Some people say that jujube mud and yam have such and such medicinal effects, which are good for Qin's condition, so Qin wants to eat. This is a delusional out of touch with reality. Even if these two things really had medicinal effects, and Qin Shi didn't understand medical pharmacology, how could she know? Even if she really knew that jujube mud yam was good for her, the great Ningguo Mansion, couldn't she still find these two things, and she still couldn't make a yam cake stuffed with jujube mud, and she still had to ask Jia Mu of Rong Guo Mansion for it?
What the Qin family valued was not jujube mud and yam, but Jia Mu's reward. For Jammu's reward has another meaning.
The day after the inspection of the Grand View Garden, Jia Mu stayed behind to explore the spring to eat, and then appreciated the dishes to Li Yi Wang Xi Feng Bao Dai, but bypassed the second spring. Why? Because Si Qi's love letter was copied out of the Yingchun House, and the silver boots in the Xichun House were copied out of the painting, they were all wrong. Jia Mu expressed her condolences to the innocent and affected Feng Bao Dai by leaving rice and appreciating the dishes - the bowl of meat given to Jia Lan was actually transferred to Li Feng, and the mother and child were one.
Rewarding food is not a general act. In particular, Jia Mu of Rong GuoFu gave food to Qin Shi, the granddaughter-in-law of Ning Guo Fu, which was not an ordinary human exchange. Therefore, Qin Keqing, who received the jujube mud yam cake, secretly gave birth to a glimmer of hope in despair: "Is it that Jia Mu has forgiven me?" ”
Qin Keqing's pitiful desire to survive prompted her to urgently ask Wang Xifeng for verification: "I poured two pieces of the yam cake that the old lady rewarded that day, and it was like a kehua movement." If Wang Xifeng went back to tell Jia Mu that Jia Mu would send someone to send it again; or If Wang Xifeng replied directly: "The old lady must be happy to hear that you love to eat, and will definitely send someone to send it again", then it means that Jia Mu forgives Qin Keqing.
Jia Mu is alone, and there is nothing important. What matters is the morality and judgment of public opinion that she represents. It's as if the temperature is high or low, reflected by a small thermometer. Jia Mu's several pieces of yam cake also reflect the moral judgment in the hearts of the world: "You are guilty, but sin does not lead to death." With this guarantee, Qin Keqing could live.
Wang Xifeng and Qin Keqing had real feelings. However, on such a major matter as convicting Qin Keqing, Wang Xifeng could not make decisions without permission. Of course, she knew Jia Mu's attitude, knew that such a serious sin as adultery by her daughter-in-law was unforgivable, and knew that the suffering of Qin Shi's long illness was still not enough to offset her sin. Therefore, she could not give Qin Keqing yam cake on behalf of Jia Mu again, but could only say that "I will send it to you again tomorrow", it was sent by herself, not by Jia Mu; it was out of the private feeling of "two good mothers and children", not public opinion judgment.
The yam cake can only be sent by Sister Feng, not by Jia Mu. Qin Keqing received the message conveyed by Wang Xifeng, and he also understood Jia Mu's attitude, understood that his "sin is unforgivable", and understood that the glimmer of hope of living was only delusional.
Since then, Qin Keqing no longer has the idea of survival, and can only sit and wait for death to come.