Abstract: A portable visual cleaning device having a gun, an air/liquid switching valve, an endoscope display, an endoscope probe, an endoscope wire, a flexible pipe, a liquid outlet pipe and a liquid storage bottle: an air inlet channel and an air transmission channel are provided in the gun; a liquid pumping port and a liquid outlet port in communication with the air transmission channel are arranged on one end of the gun; the liquid pumping port of the gun is connected to a bottle cap of the liquid storage bottle via the air/liquid switching valve; one end of the liquid outlet pipe is connected to the air transmission channel, and the other end of the liquid outlet pipe is provided with a nozzle; the flexible pipe is sheathed on the liquid outlet pipe and the endoscope wire.

Abstract: A method for processing data is provided. In the method, the terminal device receives a blocking command to screen out a specified user identification. The terminal device sends a blocking request comprising the specified user identification to the server so that the server screens out at least one data packet comprising the specified user identification when sending data packets to the terminal device. Accordingly, the embodiment of the present disclosure also provides corresponding clients, servers and systems.