高中层 meaning in English

upper mesosphere

There are kinds of people at least will constitute the mid - income group in the 20 years in the future . they are scientific investors and enterprisers ; accountants , engineers , architects and advanced technicians , high and middle rank intellectuals ; employees in government and managers in organizations and scientific researchers ; foreign enterprises and managers in such enterprises ; private enterprises and people working in industry and commerce , and so on
未来20年至少有七类人将构成中等收入者群体：科技发明人和科技企业家；金融服务等企业管理人员；律师、分析师、会计师、工程师、建筑师和高级技工；学术团体或机构中的高中级知识分子；党政机关公务员和事业单位的高中层管理人员及科研人员；外企和外企服务机构的高中级管理人员；私营企业家和农村工商业者等。