Copyright issue is certainly the key if you are talking about SimSun (known as Song Ti on windows 9x - 2000). SimSun was developed by Beijing ZhongYi Inc, M$ bought the license to use this font on their windows product (SimSun18030 and YaHei now licensed by Founder). It is neither open-source, nor free (as beer), and the license fee is HUGE.
If Zhongyi had released SimSun under any type of open license, nobody would have spend years of his/her time to make a font of his/her own. Furthermore, I doubt any of these Chinese font companies would open-source their fonts (at least in the near future) as Arphic did, because they used to get huge profit from this.
Copyright issue is certainly the key if you are talking about SimSun (known as Song Ti on windows 9x - 2000). SimSun was developed by Beijing ZhongYi Inc, M$ bought the license to use this font on their windows product (SimSun18030 and YaHei now licensed by Founder). It is neither open-source, nor free (as beer), and the license fee is HUGE.
If Zhongyi had released SimSun under any type of open license, nobody would have spend years of his/her time to make a font of his/her own. Furthermore, I doubt any of these Chinese font companies would open-source their fonts (at least in the near future) as Arphic did, because they used to get huge profit from this.