Guided by Old Xia through the jade pendant man's dream, Xiang Kun learned that the main members of their gang, and Brother Kui who led them to escape from their home country to Burma, all came from the same place. The majority of them were of the same family, and many were blood relatives.
Therefore, when the jade pendant man was worried about being left behind by Brother Kui, his fear was not being intentionally abandoned but being left behind when Brother Kui had to run due to uncontrollable circumstances and didn't have time to take them along.
So in the dream, Old Xia amplified the jade pendant man's concerns, intensifying his fear of the imminent danger. This induced a sense of urgency and fear of being skinned alive if they didn't escape. When he woke up, he immediately contacted Brother Kui.