《孟子·梁惠王章句下·第四节》
天子到诸侯国家去叫做巡狩。巡狩就是巡视各诸侯所守疆土。诸侯去朝见天子叫述职。述职就是报告在他职责内的工作。
天子适诸侯曰巡狩，巡狩者巡所守也；诸侯朝于天子曰述职，述职者述所职也。
When the Son of Heaven goes to one of the feudal states, it is called a tour of inspection.  The purpose of a tour of inspection is to oversee the territory under the control of each of the feudal lords.  When the feudal lords go to pay court to the Son of Heaven, this is known as a report on duty.  The purpose of a report on duty is to report on the work that each of them has done within his sphere of responsibility.