Update README.md

README.md

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 ### 1.1. Overview
 
-This dataset provides a curated collection of multi-sensor, multi-temporal image patches focusing exclusively on agricultural land across China in 2021. It features Sentinel-1 (Synthetic Aperture Radar, SAR) and Sentinel-2 (Optical) imagery, standardized to a uniform pixel dimension ($\mathbf{264 \times 264}$) and a consistent Coordinate Reference System (CRS) for time-series analysis. The data acquisition is governed by a rigorous workflow designed to maximize geometric and temporal consistency across four key seasonal stages.
+This dataset provides a curated collection of multi-sensor, multi-temporal image patches focusing exclusively on agricultural land across China in 2021. It features Sentinel-1 (Synthetic Aperture Radar, SAR) and Sentinel-2 (Optical) imagery, standardized to a uniform pixel dimension 264*264 and a consistent Coordinate Reference System (CRS) for time-series analysis. The data acquisition is governed by a rigorous workflow designed to maximize geometric and temporal consistency across four key seasonal stages.
 
 ### 1.2. Data Sources