Generate a piece of music. The title is Zhong yangyan. It belongs to the genres of "Xiaodiao. Laodong"and " Zhongzhi". It is from Asia, China, Shanxi Hequ. Its meter type is simple duple.  
X:1
T:Zhong yangyan
T:Zhong yangyan
L:1/8
M:2/4
I:linebreak $
K:Bb
V:1 treble nm="Voice" snm="V"
V:1
 c'f' f'd' | c'2 c'd' | bg bd' | c'4 | f'f' f'd' | f'a gb | f3 g | df dc | c'f' f'd' | c'd' c'b | %10
 gb fd | c4 | bd' c'b | gb fd | c4 | bc' f'd' | c'3 d' | c'4 || %18  