The Silver Spirit can only get the Silver Feather, defeat the Red Tyrannosaurus Rex and go to the radio tower in Huang Jincheng.
After killing the boss, the director of the radio station took the initiative to hand over the feather and then went to the last Taoist temple to pass the customs.
This story needs to be triggered in kanto region. An old man can be found on the high ground at the right exit of Nibi City in Kanto. He will give you silver feathers.