If it were not for that thorn in his heart, encountering a fellow countryman in a foreign land should have been a joyful occasion.
After all, they spoke the same language, had the same skin color, and came from the same country.
Yet, Bai Kairui would rather stay under Han Yi's command than rejoin his former companions. In truth, he knew all too well that Han Yi kept him around solely because he was useful. It was exactly this point that gave Bai Kairui a greater sense of security, knowing he still had value, so Han Yi wouldn't abandon him as casually as his friends had.
In the apocalyptic world, friendship after the end seemed too fragile in the face of survival. A relationship based on mutual benefit turned out to be stronger than the fickle bonds of friendship.
The story of what happened to him was probably more complex than the few words he spoke. In the end, Bai Kairui chose not to forgive that period of friendship. He chose to let go.