C290 He who commits wrongdoing must commit suicide

Old Gramps Su Wenlong had never told anyone about this secret code. Now, after hearing Xiao Yi's secret signal. A trace of excitement appeared on that withered face. Then, he muttered to himself, "Then, what's with your voice?"

"Sound?" Xiao Yi shook his head, changing the tone of his voice to more emphatic. He used the accent he used when he was a genius doctor, and slowly said