spoiler!
yes only 1 person knows i believe and they are someone who has reincarnated with him and i think the eldest person of the tang family (i forgot his name) knows as well bc he recognized him immediately at first glance and the heavenly demon has just appeared in the novel at around 1700 chapters plus the novel is probably like 3/5 completed so we’ll have to see if everyone will find out he’s the sword saint
i knew about the elder who made his sowrd but i didn't add him because i saw that it didn't count lol no one beleived that and he wasn't consistant about it.
but DAMN did they fight too much with the demon sect?
or did he find him early befor he got back his power and killed him without too much hindrance??

i only reached until chapter 564 in the novel and i realy want to know does anyone know that cm is the sword saint??
because the people who recognized him are the preist of the demon sect and a lama preist some had doupts but other than these two no one dicovered him..
and i beleive maybe un geom found out by noticing that the font in the martial books is thesame as cm wrote for him when he lost his arm.
could he tell any one about his rencarnation? and be beleived?
did he find the person who reborndas the heavenly demon? and did someone else got reborn and helped chung myung?