C441 surrogate is foam

I turned around and walked over to the bed. "History is no longer important. I'm more inclined to control what happens in the future than to study things that are past and uncontrollable."

After a moment of silence, Lu Sheng picked up the cup of medicine. "I'll be going out first. You should rest."

I watched him as he closed the door. I let out a long sigh and climbed into bed