处理和管理已履行的订单以及未履行或部分履行的订单，以跟踪订单履行进度。使用跟踪器和 GPS 等电子设备跟踪订单并确保订单送达。 Handling and managing orders fulfilled, along with the orders are not or partially fulfilled to track the order fulfillment progress. Use electronic devices such as trackers and GPS in order track and ensure delivery of the orders.