Origin of Hangul
Ledyard holds that the Koreans adopted five core consonant letters from ’Phags-pa, namely ㄱ "g" , ㄷ "d" , ㅂ "b" , ㅈ "j" , and ㄹ "l" . These were the consonants basic to Chinese phonology, rather than the graphically simplest letters (ㄱ "g" , ㄴ "n" , ㅁ "m" , and ㅅ "s" ) taken as the starting point by the "Haerye." A sixth letter, the null initial ㅇ, was invented by Sejong. The rest of the consonants were developed through featural derivation from these six, essentially as described in the "Haerye"; a resemblance to speech organs was an additional motivating factor in selecting the shapes of both the basic letters and their derivatives.
Hang (instrument)
As of December 2013 PANArt announced that the Hang would no longer be made, as the PANArt tuners were completely concentrated on a new different instrument, the Gubal. In the following years PANArt developed a number of other instruments called "Hang Gudu", "Hang Urgu", "Hang Bal" and "Hang Gede" as well as a number of string instruments and created a collective improvised music form played with these "Pang instruments".