Update README.md

README.md

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 **visualize**: This directory includes the figures presented in the paper and the corresponding training records (in .csv files) required to reproduce them. These data can serve as a baseline for developing new algorithms and benchmarking against our method.
 
 
+Please refer to [the first document](https://github.com/ReinFlow/ReinFlow/blob/release/docs/ReproduceExps.md) to see how to do pre-training on the offline datasets and fine-tuning with the pre-trained checkpoints. 
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+Please refer to [the second document](https://github.com/ReinFlow/ReinFlow/blob/release/docs/ReproduceFigs.md) to extract and visualizee the training records in the `./visualize` folder. 
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