Update README.md

README.md

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 # RxnBench: Benchmark Dataset for Chemical Reaction Figure Comprehension
 
-We curated a collection of 305 figures related to organic chemical reactions, selected from multiple high-impact OpenAssess journals.
-For each figure, domain experts designed five multiple-choice VQA questions targeting chemical reaction figure understanding, which were then refined through several rounds of rigorous review and revision.
-Answering the questions in this benchmark requires expertise at the level of a Ph.D. in organic chemistry or higher.
-Our benchmark is released in both English and Chinese versions.
+We curated a dataset of 305 figures related to organic chemical reactions, selected from multiple high-impact OpenAssess journals. In total, it contains **1,525 question–answer pairs**. For each figure, domain experts designed five multiple-choice VQA questions focused on chemical reaction figure understanding, which were refined through several rounds of rigorous review and revision.
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+Answering these questions requires expertise equivalent to a Ph.D. level in organic chemistry or higher.
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+The benchmark is available in both English and Chinese versions.
 
 |  Moldel   | Weight | UpdateTime | RxnBench-En  | RxnBench-Zh |
 |----|:----:|:----:|:----:|:----:|