How far is the mobile phone from the portrait suitable for online thesis defense?

Hello, the distance between a mobile phone and a portrait is about half a meter.

Network defense is generally suitable for people to occupy one-third to two-thirds of the screen, that is, your photographic equipment needs to be about half a meter away from yourself, which can be adjusted according to the actual situation. In addition to the distance between people and mobile phones, there are many things that need attention, such as adequate light, good network, decent clothes, loud enough voice and clear pronunciation. Then you need to communicate with your tutor, don't look away, just answer the questions confidently.