The cast (probably just descriptions of characters instead of the names):
Water Magician – Raymond Wong Pak-Ming
Earth Magician – Wu Chun
Fire Magician – Wu Jing
Metal Magician – Tonny Jan
Wood Magician – Louis Koo Tin-Lok
Devilish Coach – Yan Ni from All’s Well, Ends Well 2011
Magical New Star – Karena Ng
Trailer:
via @LoveHKFilm