How to do well the task of "the secret of singing folk songs"

Talk to the unknown fortune teller in Sheng Yuan first, and the task will become soulful. After entering Chao Ge Mountain, find two stone points, they will get two stones, and then summon the stones to the unknown fortune teller to complete the task. This is what fortune tellers do. If you can't talk to the two stone statues of Chao Ge Mountain for the first time, you will go to an unknown fortune teller, and then talk to the unknown fortune teller and become soulful. If you can't finish it, you'll have to buy your own formula to make an illusion.