It can be seen from some aspects that he has a father's love for Shinji, but he is afraid to show it out of guilt or ashamed to show it. However, this is not enough to make Du Yuan change his decision. He must choose between his lover and his son. But in the big environment at that time, who to choose was decided from the beginning. Choosing a lover may not have a future, but it can fulfill his wish and save his soul. If you choose your son, you will lose the whole game. He will lose everything and his future will be dark.
In the real world, the commander is definitely a good father and husband. Although he may seem harsh and indifferent to children, he will silently support and protect them behind their backs and be happy for their growth. It's a pity that he was born in such a world, and he is at the center of the whirlpool of the world. Du Yuan had to make a choice, but he had no choice.