Ying you er ying yang pei can

Ben shu gen ju ying you er sheng chang fa yu de te dian, jie shao he li ying yang yu ying you er sheng chang fa yu de guan xi, ge lei shi wu de ying yang jia zhi, shi wu zhong ying yang de sheng li gong neng he lai yuan ; gen ju ying you er bu tong sheng chang fa yu shi qi de ying yang xu yao te dian he ju jue yu xiao hua neng li, jie shao le kuo he ying you er te dian de shi pin, ta men de zhi zuo fang fa he ying yang te dian, yi ji zhi zuo ying you er shi pin zhong ying zhu yi de wen ti.