Which of the poems in Tang and Song Dynasties can express gratitude to colleagues?

Du Fu once wrote a poem for Yanwu. From the poem, we can easily find Du Fu's gratitude to Yanwu, because the two were colleagues and established a solid friendship at that time. This poem is a farewell at fengji station to general yan.

a farewell at fengji station to general yan

Tang Du Fu

this is where your comrade must leave you, turning at the foot of these purple mountains.

when shall we lift our cups again, I wonder, as we did last night and walk in the moon?.

the region is murmuring farewell, to one who was honoured through three reigns.

jiangcun lonely place, into the final solitude.