yiyi同管理系统具有公司管理、合同管理、合同类别、人员管理等功能。合同类别，分三级会员管理，基本的增，删，改，搜功能。 管理员和密码都是admin-Yiyi management system with company management, contract management, contract type, personnel management and other functions. Contract type, three levels of membership m