I want to tell you how to be a professional singer.First,Professional means through systematic learning the basics of music,including ear training,vocal training,style,positioning,through professional examination,and the diploma,or performing experience,competition results.
Professional point is that the tutelage of a certain artist,or in the province,Foreign radio and television stations have performing experience.Albums,release work,filming MTV,record companies and so signed.
only if you have the above experience ,it indicates that you are a professional singer.