My Brother and I Transmigrated Together: He Became the Crown Prince, and I Became a Commoner’s Daughter

Lin Banxia, a modern PhD in traditional Chinese medicine, and her twin brother Lin Lingxiao are unexpectedly reborn in the wombs of concubines in an ancient general's household after a laboratory explosion. At seven, she discovers a portable space of her own, filled with modern medical equipment and medicinal herbs. At nine, she finds another space inside a jade pendant. Unable to control it herself, she gives it to Huo Lingxiao, her brother from her previous life and the crown prince in this one. To her surprise, Huo Lingxiao can use the space. Lin Banxia's birth mother dies in childbirth, and her legal mother takes her in to raise her. She becomes the darling of the whole household.

She eases her general father's old injuries and even uses modern medicine to save the wounded heir of the Prince of War's household. The heir falls deeply in love with her and rejects a princess sent for a political marriage. Everyone in the general's household cherishes her, and the crown prince, her twin brother from her previous life, indulges her without limit.

The crown prince uses the space to help the people survive natural disasters and evade assassination attempts. In the end, the siblings take their loved ones to the world of pets to devote themselves to cultivation.