This is a wild guess as I only watched one episode of this serial, but it's the only wuxia serial I can think of which had two blacksmiths - one working for the good guys and one working for the bad guys. The Hunter's Prey, 1990.
http://www.youtube.com/watch?v=sCOdLV8SLYQ
The Blood-Stained Intrigue (1986) had two meteors forged into a sword and a saber, but neither blacksmith was technically really a blacksmith, and neither of them worked for any king.