update readme.md

README.md

@@ -9,14 +9,14 @@
 ![](https://img.shields.io/pypi/l/kashgari.svg?style=flat)
 [![](https://img.shields.io/pypi/dw/kashgari.svg)](https://pypi.org/project/kashgari/)
 
-Simple and powerful NLP framework, build your state-of-art model in 5 minutes.
+Simple and powerful NLP framework, build your state-of-art model in 5 minutes for named entity recognition (NER), part-of-speech tagging (PoS) and text classification tasks.
 
 Kashgare is:
 
 * **Human-friendly**. Kashgare's code is straightforward, well documented and tested, which makes it very easy to understand and modify.
 * **Powerful and simple**. Kashgare allows you to apply state-of-the-art natural language processing (NLP) models to your text, such as named entity recognition (NER), part-of-speech tagging (PoS) and classification.
 * **Keras based**. Kashgare builds directly on Keras, making it easy to train your models and experiment with new approaches using different embeddings and model structure.
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+* **Easy to fine-tune**. Kashgare build-in pre-trained BERT and Word2vec embedding models, which makes it very simple to fine-tune your model based on this embeddings.
 
 ## Feature List