His name is Aheng.
When he first entered the Qin Mansion when he was young, he was told that he existed only as a substitute for the young man in front of him, and that his duty was to protect him throughout his life.
In fact, he no longer cares about this world, and it would be no regrets to die immediately. But every time he saw a face that was somewhat similar to his but without a smile, he couldn't bear it.
From then on, protecting him became the only reason why he struggled to survive in this life.
Intention: We are always testing human nature, but we can never control it. Those temptations just keep hurting the loved ones around us, and in the end, we are left alone, alone.