Jing can dream what will happen in the next day. : http://aishveen.deviantart.com/art/Yan-Jing-557965400?q=gallery%3AAishveen%2F49673260&qo=2

her cutie mark is a eye here's a image: http://www.whats-your-sign.com/eye-of-horus-meaning-and-tattoo-ideas.html

Jing basically bit like power to Pinkie's power the pinkie sense but more powerful since Jing can for foresee what will happen next.