Generate a piece of music. The title is Songlang danghongjun. It belongs to the genres of "Xiaodiao"and " Wanglang diao". It is from Asia, China,Henan Xinxian. Its meter type is simple duple.  
X:1
T:Songlang danghongjun
T:Songlang danghongjun
L:1/8
M:2/4
I:linebreak $
K:Bb
V:1 treble nm="Voice" snm="V"
V:1
 d'd'/f'/ d'c' | d'd'/f'/ d'c' | bb gd' | c'4 | f'd' d'd' | c'c' bg | bc' gg | f4 | d'2 d'd' | %9
 d'b c'c'/c'/ | c'b gg | f4 | gc' c'c' | g2 bg | f4 || %15  