How did the carry out order Story of aged mother?

The story "The Story of the Aged Mother" is about a son and his mother who are faced with the emperor's decree to abandon old people on a mountain to reduce the population. The son chooses to carry out the order, but instead of leaving his mother to die, he carries her up the mountain where she reveals the value of life and the importance of love and compassion. They both experience a miracle that saves them and brings wisdom to the son.