单双买法公式

简介：Su Can turned his head and looked to the left again. Cheng Keshu lowered his head and sorted out his geographical notes. A pen was held tightly in his delicate hands and he was writing on the paper. His slightly upturned oval face was very beautiful, and his waterfall-like hair was tied to his ears. From behind, the crystal clear earlobes are exposed, with a little fluff, which turns golden in color and looks extremely cute under the sunlight.