How does Huawei nova3 cancel the ringtone when the message is sent?

In the settings of your mobile phone, there is a voice button with your message prompt and your mobile phone ringtone, which can be set. If you don't want the message prompt tone, you can change it to none, so that your mobile phone won't have any prompt tone when there is a message, and you can also change the ringtone and message prompt tone inside.