Why can't I meet Bei Ming Ju Kun?

There are several conditions. You want to kill the golden dragon with five claws. It has Poseidon beads, so you should match it. You have to kill the Dapeng bird, and then go to the north to make a cloak. This, together with the cloak of yellow sand and what the barbarians got, will be replaced with gold powder. Then you can meet two points on the map. One at the top, one at the mouth of the sea and one at the bottom. In fact, I feel random and not so fixed.