xù xū míng zhì
to grow a beard as a symbol of one's determination (as Mei Lanfang 梅蘭芳|梅兰芳[Mei2 Lan2 fang1] growing a beard and refusing to perform for the Japanese)
yǐ sǐ míng zhì
to demonstrate one's sincerity by dying
míng zhì
to demonstrate one's sincere convictions
dàn bó míng zhì
living a simple life as one's ideal (idiom)