Update README.md

README.md

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 # Dataset Card for Nexdata/Mandarin_Pronunciation_Dictionary
 
 ## Description
-The data contains 570,060 entries. All words and pronunciations are produced by linguists. It can be used in the research and development of Mandarin ASR technology.
+This dataset is just a sample of 570,060 entries Mandarin Pronunciation Dictionarydataset(paid dataset). All words and pronunciations are produced by linguists. It can be used in the research and development of Mandarin ASR technology.
 
-For more details, please refer to the link: https://www.nexdata.ai/datasets/pronunciation/1094?source=Huggingface
+For more details & to download the rest of the dataset(paid),please refer to the link: https://www.nexdata.ai/datasets/pronunciation/1094?source=Huggingface
 
 # Specifications
 ## Format