他们知不知道都没关系。 It doesn't matter if they know or not. Traditional 他們知不知道都沒關係。 Pinyin Tāmen zhī bù zhīdào dōu méiguānxi. Bopomofo ㄊㄚ ˙ㄇㄣ ㄓ ㄅㄨˋ ㄓ ㄉㄠˋ ㄉㄡ ㄇㄟˊ ㄍㄨㄢ ˙ㄒㄧ。 Where this sentence is used How to use 没关系 (mei2 guānxi) in Chinese: it doesn't matter, not related to All Chinese example sentences
