C219 Where is my son?

Ye Mu Ning started to type crazily.

Now she finally understood what a real code machine was. When his fingers tapped on the keyboard, he even felt as if he was playing the piano. The continuous, rhythmic sounds of knocking actually made her feel a sense of comfort. It was as if the entire world had been struck by this, and at this moment, even the clock beside him seemed to have stopped moving