The merchant said that if the singer in the bar can't sing, then he should sing. The merchant said that if the singer in the bar can't sing, then he should sing. Song Jia said that if the lead singer in the bar can't sing, then he should sing. However, if you don’t know how to sing, you can sing in the bar if he comes. If you can’t sing, let him sing. Song Jiang said that you can sing in the bar. If you can’t sing, let him sing.