This world would go on without anyone, including Ji Xinghe.
Likewise, the return of anyone to this world, including Li Zhenfan, would not halt its motion.
Of course, that's under the assumption that Li Zhenfan never truly died.
But after all, there is a big difference.
"The Empire's technology in this area is similar to ours, but there are significant differences in reality. Therefore, while there are no apparent issues with the current life support system sustaining General Li... Zhenfan, we dare not make any changes lightly."
As he mentioned Li Zhenfan's title, the person in charge of medical care hesitated but ultimately used the title of General.
Theoretically, the current Li Zhenfan could very well not be the real Li Zhenfan, since his body is missing so many parts. It could also be phrased differently: there isn't much left of Li Zhenfan's body.