In "Teasing Zhang Ji" Han Yu praises Li Bai and Du Fu and mocks the people who looked down on them.
Tips
culture
It opens 李杜文章在，光焰万丈长, 'the writings of Li and Du endure, their flames ten thousand feet long', and mocks their critics: 蚍蜉撼大树，可笑不自量, 'ants trying to shake a great tree, laughable, not knowing their own size'. The idiom 蚍蜉撼树 comes from it.
usage
调 here is tiáo 'to tease', as in 调侃, not diào. The title is a friendly jest at 张籍, a fellow poet, rather than a rebuke.
