What does Bai Song mean by going all the way to Linggong?

A cypress trail: that is, a cypress trail, with cypresses on both sides of a road. Trend: go; Trend. Gong Ling: This is part of the palace pavilion dedicated to the gods. This refers to Heng Yue Temple.

The poem "Pine and cypress all the way to Linggong" means: follow the pine and cypress path to Linggong.

This is Han Yu's Poem of Stopping the Temple at Hengshan Mountain. I wrote this poem on the rostrum. Poets express their deep feelings by looking up at the peaks in Heng Yue, paying homage to the temple gods in Heng Yue, divining the good or bad of their career and staying in the high temple. On the one hand, he was glad that he finally returned to the north alive in the wild, on the other hand, he expressed his dissatisfaction with the bumpy official career, which was actually a protest against the supreme ruler.