The first translation into Russian of an early Persian treatise on the art of composing poetry by the famous Shams-i-Qais Razi, is accompanied by a research introduction and a detailed commentary. This edition includes the second part of the treatise - “On the science of rhyme and criticism of poetry” Contents: Chalisova N . Yu. Persian poetry on the scales of poetry. Code of rules of Persian poetry Part 2. On the science of rhyme and criticism of poetry. translation.Section one. About what “poetry” and “rhyme” mean, about their definition and essence. Section two. About rhyming harps and their names. Section three. About the vowels of rhyme, about the name of each of them and its origin. Section four. About the sections of rhymes and their categories, with a mention of harps and vowels, which are mandatory for each rhyme. Section five. About the vices of rhymes and uncommendable qualities that are found in poetic speech Section six. About the beauties of poetry and about a small fraction of the decoration techniques used in poetry and prose. Conclusion. Commentary. Appendices (Literature; Annotated index of poets quoted in the treatise; Index of names; Index of untranslated terms; Index of Quranic quotations)