According to feng shui, what ringtone is better for mobile phones?

You have to understand what feng shui is. Geomantic omen is just a kind of Daoism of Zhengyi teaching (because my master is Zhengyi teaching and others don't understand it). Defined by compass, heavenly stems and earthly branches and plough, water flow is defined by Beidou, plough and landscape, spreading to five elements. Therefore, the situation is harmonious and favorable. There is no classified music.