In my opinion, it is a prayer, and from the sentence, it should be a chanting of the Dharma Association, which is inferred to be used by the Dharma Association!
Some magicians have their own methods of praying or summoning. From the perspective of "Ganlu", it is another name for Amitabha Tathagata. The incarnation of amitabha. The name of the dew king Tathagata is used more than when giving alms to hungry ghosts. In addition, there is the mantra of manna.
The "arrival of the lonely soul Buddha" is to pray for the Buddha to be present to cross over the lonely soul. Content is the purpose of coming in the future.