does your mother need son in low (son-in-law?)
Is the empress the titular mother(-in-law)? Does she become part of the [Harem] later on?Long ago, Chien Han underwent "forced cultivation" because of the domineering empress.
He cut off part of his soul to escape from the tiger's den!
After that he is reborn in a new body. In this life, he will study military affairs and master spiritual practices.