While Malik has remained mostly silent since parting ways with the boys, he seems to be busy at work on solo material. Meanwhile, the One Direction quartet are already working on their fifth album, which is expected to drop this year.
Zayn's message is short and sweet, with a little clarification to stop any rumors or conspiracy theories in their tracks.
In case you were confused, he's not using x to do algebra on Twitter, or to mark the spot of buried treasure -- he's just sending a kiss.