Cantonese of the day
Since I am travelling mostly by MTR, I keep hearing this sentence, which I have finally identified thanks to a written version on the doors:
請小心月台空隙
ceng2 siu2 sam1 jyut6 toi4 hung1[3?] gwik1
[In Sino-Korean: 청소심월태공국]
請: Please, imperative
小心: Be careful
月台: platform
空隙: gap, empty space