“平仄” refers to the tonal patterns in Chinese poetry, specifically in the context of Classical Chinese verse. It distinguishes between two types of tones: “平” (level) tones, which are even and steady, and “仄” (oblique) tones, which include rising, falling, and departing tones. This system is essential for maintaining rhythm and musicality in poetry. In traditional Chinese literature, poets carefully arrange these tones to create a harmonious flow. The balance of “平” and “仄” contributes to the overall aesthetic and emotional impact of the poem, making it a fundamental aspect of Chinese poetic forms like regulated verse (律詩).