Lau Ka-yue, 16, Pui Kiu College: The thumbs down emoji represents negativity. In times of great turbulence and uncertainty, ...

Tears of joy, hearts and thumbs up are some of the most common emojis people use to communicate, but the way kids use them could hold a double meaning.

Now parents are being warned that they should be aware of this secret emoji language to keep their children safe. Experts say the he use of what may seem like "harmless" or "playful" emojis poses ...