Smile meaningfully but keep silence.
Smilence occurs when
you know what is going on, but decided not to speak it out. However
your smile betrayed your attempt.
You do smilence because that you
do not want to hurt others' feeling or harm yourself; or the answer is forbidden to say or too trivial or simply useless.
When the party says that
freedom of speech is a
fundamental right of Chinese citizen endorsed by
the constitution, the shitizens all keep their smilence.
"Why are you smilent! Who do you think is more beautiful, Helen or me?" my girfired asked me.