I just had a thought, is it possible that hong'er is the number one heavenly treasure? It is a sword, plus it has a heaven in its name. Also, there is sealed soul on it or she is the sword itself which can be construed about what the dragon soul fragment said about his daughter sealed in the number one heavenly treasure. Another point is nobody had found the sword since it had been hidden in the profound ark. What do you think? If this is true, then yun che had three of the seven heavenly treasure and he could possibly acquire all.
can't really remeber where but saw this same spoiler and the answer is Spoiler NO!!! Diferent girls anddiferents swords
I'm willing to bet that the two swords are completely different. But in order to free the soul of the dragon God's daughter, he's going to feed that number one treasure to Hong'er