C3820 External Head External Head but You Can!

"Gao Fei, Qin Hao, you two don't even make a sound when you walk. It's a ghost!" Yu Jiajia was given a fright and her expression changed. She did not know if she had heard what she had said about Shen Xiangyang.

"How long have you been following us?" Xiao Lin asked out of curiosity.

"Who followed you? I happened to hear you two talk about the last mathematics question. " Gao Fei said