Officially, we know that the Siu Yiu Sect and the Deun Royal Family of Dali first crossed paths when Deun Yu stumbled upon the cave at the bottom of Mo Leung Mountain and found the manuals to Bak Ming Sun Gung and Ling Bor Mei Bo.
I'm not certain, but I believe that the Mo Leung Mountain was located within the borders of Dali Kingdom, not the Sung Kingdom. If so, might there have been some connection between the Siu Yiu Sect and the Deun Royal Family even *before* Deun Yu? Was the Ling Jau Palace also located within Dali borders?