But the old man gave the main core formula to Qin Xue, and that would make anyone anxious. Later, Qin Xue returned the recipe to the other party, but she had already memorized its contents.
Now, Qin Xue has returned to decades ago, and she's giving this recipe to her mother. She doesn't know if doing this will disrupt historical development, but it's just a difference of decades, so it can't be considered history.
Qin Xue feels there are still some differences between this space-time and the one she originally lived in and hopes there won't be too many intersections. Otherwise, she really doesn't know how to explain it to the original creators.
Even though she won't get to see her grandparents like this, she still has explanations to give to others, doesn't she? Qin Xue feels that thinking this way is not right, but there's no alternative. Gain always comes with loss, which is exactly her situation.