This casting news is for a new adaptation for the famous book series Xiaoli Feidao Flying Daggers by Gu Long. The production team will start shooting very soon, in the late August. They are aiming for a 30 episodes drama. Hawick Lau will play the character of Li Huai while Yang Rong will play Xue Caiyue, the number one female assosin of Wulin. Both are currently recording a travel variety show with CCTV and will go to the filming set right after.
The story is actually quiet complex and as I never watched the previous adaptations, I am really unqualified to give a summary😛 Good thing is their wiki page is full of information for you to read! Here
Hawick Lau as Li Huai: He is the grandson of Li Xunhuan, the genius master of flying daggers. He is the only son of Li Manqing and Shangguan Jinhong.
Yang Rong as Xue Caiyue: The number one fighter of Wulin, also called Moon Goddess. Apparently, nobody had ever seen her true full capacities in a fight.
Huang Ming as Li Zheng: The half brother of Li Huai.
Gui Gui as Fang Ke Ke, the second female lead. She is a sparkling girl who has a crush on (duh) the male lead.
Kenny Kwan as Long Tu
Although I heard about the story often when searching for good wuxia dramas to watch, I never actually watched any concrete adaptation. However, I know that Ruby Lin did a great version in 2003 so you may want to check that out before!