url : http://www.unicode.org/charts/PDF/U17000.pdf#page=42
url : http://www.unicode.org/charts/PDF/U18800.pdf
url : http://www.unicode.org/L2/L2016/16271-n4771-khitan-small-chart.pdf
url : http://www.unicode.org/roadmaps/smp/
url : http://www.unicode.org/L2/L2014/14234-n4631-khitan.pdf