Hyang-Ka
Hyang-Ka is song played during 'Shin-Ra' dynasty. It use 'Hyang-Chal' system for writing it. It has three type; first has for lines, second has eight, the last has ten lines. We call each for 'Sa-Gu', 'Pal-Gu' and 'Sip-Gu'. First time 'Sa-Gu' and 'Pal-Gu' is populary used. But after Shin-Ra united Korean peninsula, 'Sip-Gu' are sung widly.
 
 
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