It was so weak that it was barely audible. However, at least it was still beating. His heart held on despite the reality that it really shouldn't have. Xinghe was thankful for that.
Xinghe bent down to take a close look at Mubai. She opened her lips to say, "Xi Mubai, if you can hear, please promise me that you'll hang on and not surrender. This is my only request of you, I ask that you hold on. No matter how hard it might be, please do not give up. I will not give up on you and so I ask that you do the same for me. Let's survive this together, okay?"
Xinghe's only reply was the beeping from the electrocardiogram. That was as good a promise as any for Xinghe. His heart was still beating so she knew he would hold on. She knew he was the most determined person in the whole world so someone like him wouldn't die so easily.