Who is Cheon Yeong-cho and why is it insulting that <#Snowdrop> is using her name?

Yeong-cho was a symbol of the democratization movement. She was leader to “Garayeol” : women circle who discussed, resisted, and acted in a male-centered environment during the PCH dictatorship. pic.twitter.com/BRXb0FFIVE

— closed (@joyfuljoyfuI) March 27, 2021