It is never too late to take revenge
Bai Zemin did not waste too much of his time with someone as insignificant as Bai Jian was to him and to the world as a whole. In fact, had Bai Jian not made him angry after treating him as if he were an ant when in fact the only ant was him, Bai Zemin might not even have bothered with someone like him.
Therefore, after letting him see clearly how all the troops had surrendered to him and slowly began to enter the camp walls again under his command, Bai Zemin let someone else take care of Bai Jian.
This arrogant young master who put no one in his eyes did not live for more than two months in this new world. This was another definite proof that those who relied too much on their past backups could meet miserable fates if they offended someone who in the past had nothing but in this world managed to acquire amazing power after evolving by themselves.
When the world changed, times and circumstances also changed.