Only men's world, ancient beauty
Xiao Shou and another Xiao Shou were sent to the palace, and whoever gave birth to a healthy heir apparent could become a concubine.
Xiao Shou gives birth to a real but frail prince
Another gave birth to a healthy baby boy but was not the real crown prince.
After living among the people for four years, he returned to the palace as a miracle doctor, and his son's frail disease was also cured.