readme

README.md

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 ## Overview
 
-HiCoTraj demonstrates how a large language model can infer demographic attributes — specifically **household income** — from raw human mobility trajectories, using a three-stage hierarchical chain-of-thought (HiCoT) prompting strategy. No training data or fine-tuning is required; the model reasons step-by-step from spatial patterns alone.
+HiCoTraj is a demo that shows how a large language model can infer demographic attributes, specifically household income, from raw human mobility trajectories through a three-stage hierarchical chain-of-thought prompting strategy. It does not require training data or fine-tuning.
 
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