「紙包唔住火」

(pos:語句)
<explanation>
yue:秘密始終都會守唔住
eng:no secrets will be kept forever; literally "paper cannot wrap up a fire"
<eg>
yue:紙包唔住火，坦白好過啦。 (zi2 baau1 m4 zyu6 fo2, taan2 baak6 hou2 gwo3 laa1.)
eng:No longer you can conceal it. You'd better confess.