Transmigrate With a Baby: I Opened a Supermarket in Ancient Times

My massive, all-purpose supermarket had just been built when I transmigrated? And I ended up as a beggar concubine to an exiled prince? Fine, I can accept that, but how did my perfectly good son turn into a daughter? Give me my son back... Being exiled a thousand miles away isn’t scary. What’s scary is having a clever mind and useful knowledge. My son is a top student, and his mother has brains. Whoever wants this troublemaking prince can take him away. Son, run! Your deadbeat dad is chasing us again...