C301 Pengci
In short, it was all thanks to Lu Tong's guidance that the envoy was able to successfully save Princess Loong Yuv.
If it wasn't for the fact that he asked for this piece of jade before leaving, Princess Loong Yuv probably would have gone to see the Lord of the Underworld long ago.
However, this was not the main reason why Lu Tong asked the envoys to come. After all, he was here with a mission