[update] revise sections

Author: SunnyHaze

README.md

@@ -18,25 +18,33 @@
 
 </div>
 
+
+## News
+- [2025-07-25] 🎉 We release the dataflow-agent.
+- [2025-06-30] 🎉 We release the documentation of dataflow.
+<!-- - [2025-05-30] 🎉 We added two data processing pipelines, i.e. knowledge base cleaning, and agentic rag data construction pipeline. -->
+<!-- - [2025-04-30] 🎉 We added four data processing pipelines, i.e. text, code, nl2sql, and reasoning data pipeline. -->
+<!-- - [2024-12-26] 🎉 Our first data evaluation and processing system is now open source. -->
+- [2024-10-14] 🎉 We summarize data evaluation papers and codes in [👋 Awesome Data Evaluation](./Awesome_Data_Evaluation.md)
+- [2024-10-14] 🎉 Our first data-centric evaluation system is now open source.
+- 
 ## Overview
-DataFlow is a data evaluation and processing system designed to 1) evaluate data quality from multiple dimensions; 2) filter out high-quality data and 3) generate chain-of-thought or other types of augmentation. We mainly support SOTA algorithms within academic papers with strong theoretical support.
+DataFlow is a data evaluation and processing system designed to:
+1. Evaluate data quality from multiple dimensions; 
+2. Filter out high-quality data and 
+3. Generate chain-of-thought or other types of augmentation. We mainly support SOTA algorithms within academic papers with strong theoretical support.
 
 <!-- We now support text, image, video, and multimodality data types. -->
 Specifically, we first build various `operators` based on rules, LLMs, and LLM APIs, which are then assembled into six `pipelines`. These pipelines form the complete `Dataflow` system. Further, We also build an `agent` that can flexibly compose new pipelines with existing `operators` on demand.
 
+
+## Pipelines
 Current Pipelines in Dataflow are as follows:
 - **Reasoning Pipeline**: Enhances existing question–answer pairs with (1) extended chain-of-thought, (2) category classification, and (3) difficulty estimation.
 - **Text2SQL Pipeline**: Translates natural language questions into SQL queries, supplemented with explanations, chain-of-thought reasoning, and contextual schema information.
 
 
-## News
-- [2025-07-25] 🎉 We release the dataflow-agent.
-- [2025-06-30] 🎉 We release the documentation of dataflow.
-- [2025-05-30] 🎉 We added two data processing pipelines, i.e. knowledge base cleaning, and agentic rag data construction pipeline.
-- [2025-04-30] 🎉 We added four data processing pipelines, i.e. text, code, nl2sql, and reasoning data pipeline.
-- [2024-12-26] 🎉 Our first data evaluation and processing system is now open source.
-- [2024-10-14] 🎉 We summarize data evaluation papers and codes in [👋 Awesome Data Evaluation](./Awesome_Data_Evaluation.md)
-- [2024-10-14] 🎉 Our first data-centric evaluation system is now open source.
+
 
 ## Installation
 For environment setup, please using the following commands👇