The principle of visible light communication technology is very simple, the light represents 1, the light goes off 0, and the combination of light and off carries information. However, because the frequency of visible light is much higher than the wireless network communication signal, its linearity of propagation is very strong, slightly If there are obstacles, communication will be interrupted. Considering technological development trends and product practicality, visible light communication is not widely used in homes to replace wireless networks, but this does not mean that this technology has no practical value. This technology is not useful in broadcasting. It has exciting application prospects in public communication. Using visible light communication technology, light-emitting diode signal lights can tell the driver that there is congestion in straight ahead, and it is recommended to turn right and take another road. Can we deduce from this text? ['The use of visible light communication technology will make the city truly a smart city.', 'At present, the core technology of visible light communication has made a huge breakthrough.', 'Visible light communication technology will shine in public communication.', 'Visible light communication technology will make a radical change in the home network.']