> are you sure it's more free than fonts-wqy-* or fonts-arphic-*? Google Noto CJK fonts were/are published under the SIL Open Font License. So that became default fonts of Ubuntu 18.04 LTS for CJK users.
Sincerely, CJK user Byung-Hee -- ^고맙습니다 _白衣從軍_ 감사합니다_^))//