Abstract: This application describes examples of a data processing method and apparatus. In one example, the method includes: If a target buffer that is corresponding to a target priority and that is on a network device reaches a first threshold, the network device sends a pause message to an upstream device, so that the upstream device stops sending a first data packet corresponding to the target priority. If a duration in which the network device stops buffering a second data packet is greater than a preset duration, and the target buffer falls back below a second threshold, the network device sends a sending resumption message to the upstream device, so that the upstream device sends a third data packet corresponding to the target priority.

Abstract: Disclosed are a rare cell capture system and an application thereof. The system comprises a fluid tube device, a circulation power apparatus device, a component capture device and an optional anticoagulant release device, the circulation power apparatus device and the component capture device being connected in series to a fluid circulation system via the fluid tube device to form an extracorporeal fluid circulation pathway, the component capture device comprising a microfluidic chip or a chipset. Also disclosed is a method for using the capture system to capture rare cells in blood. The system and the application thereof have the advantages of being large-capacity, in-line and low-hemolysis.