Expressing the thoughts of the deceased, the old friend has a clear personality of love and hate, but the future is bright. Its voice and smile echoed in the ear, and it felt like an old friend was around.

Sound refers to sound, and capacity refers to face. So the voice and volume are still there, which can be understood as if his voice and face are still there. Generally used to commemorate the deceased relatives and friends.

A smile on a person's voice is an idiom in China, which means the appearance and expression when talking and laughing. Remember the voice, appearance and expression of an old friend.