Complex sentence: He was the first to question established theories of rhyme schemes (patterns of sounds at the end of lines in poetry) in ancient literature and proposed twenty-eight variations instead of the older version of twenty-six variations established by his teacher Zhang.
Split into simpler sentences: He was the first to question established theories of rhyme schemes (patterns of sounds at the end of lines in poetry) in ancient literature. He proposed twenty-eight variations instead of the older version of twenty-six variations established by his teacher Zhang.