Duality: Leaves fall like the waves of a waterfall, and I watch the long river roll forward. Du Fu's poems are all duality.
Metaphor: Big strings like rain and small strings like secret words are all poems and metaphors of Bai Juyi.
Truth: Chushan and Qinshan are both Baiyun, and the director of Baiyun is with you. Or lower your head to get lotus seeds, which are as clear as water. This is all true.
Personification: This height is difficult for yellow cranes, so pity those poor monkeys with only claws. Li Bai's poems are anthropomorphic, which endows apes with human worries.