C1609 Old and Muddle-headed

"I told you, did you hear me?" Kang Jin said impatiently.

Six-finger Chen was speechless for a moment, and a trace of shame appeared on his face.

He waved his fan and fell into silence.

Kang Jin said again, "I know almost everything about this. Some of the high-end equipment maintenance is confidential. I sent some people to learn from the German technicians