A Large-Scale Chinese Knowledge Graph-Text Alignment Dataset for Benchmarking Knowledge-Grounded LLMs

Reliable evaluation of knowledge-grounded Large Language Models (LLMs) in Chinese requires resources that explicitly align Chinese-language text with verifiable Knowledge Graph (KG) facts. Yet existing Chinese benchmarks primarily assess general language understanding and offer limited support for structured reasoning under Chinese-specific linguistic phenomena. We introduce the Chinese Data-Text Pair (CDTP), a large-scale Chinese KG-text alignment dataset comprising more than 7 million aligned instances across four broad domains. Each instance pairs a Chinese-language text with one or more textually supported KG triples, totaling 15 million triples. A multi-stage construction pipeline combining alignment filtering, manual verification, and external evidence validation improves semantic consistency and factual reliability. CDTP supports Knowledge Graph Completion (KGC), Question Answering (QA), and Triple-to-Text Generation (T2T). Across all three tasks, the benchmark design accounts for Chinese-specific phenomena, including polysemy, word-segmentation ambiguity, and context-dependent entity interpretation, enabling the evaluation of structured reasoning, ambiguity-aware factual understanding, and knowledge-grounded generation. Experiments with diverse open-source and proprietary LLMs show that model scale alone does not guarantee reliable performance on these Chinese knowledge-intensive tasks, whereas supervised fine-tuning on CDTP consistently improves in-domain performance and out-of-distribution robustness. The publicly accessible dataset, code, and evaluation protocols provide a reusable resource for developing and evaluating knowledge-grounded LLMs in Chinese.