Who Should Die Between Bai Yueguang's Substitute and Gong?

Gong's Bai Yueguang went abroad and there was no news. A substitute came to Gong's side, and Bai Yueguang came back. You see, some Gong and the substitute are together, some Gong and Bai Yueguang are together, and some Bai Yueguang is together with the substitute. Is there another ending to the story? Outline article, author Weibo: Bald Qianshan Come in and debate with me! Concept: In the tug between ideals and reality, I feel lonely like a depressed patient