tushare 是做什么的？
A Tushare data research skill for Chinese natural language queries. Converts requests like 'How is this stock doing lately?', 'Check financial report trends', 'Which sector is the strongest?', 'What are northbound funds buying?', or 'Export market data for me' into executable data fetching, cleaning, comparison, filtering, exporting, and basic analysis workflows. Suitable for A-shares, indices, ETFs/funds, financials, valuations, capital flows, announcements/news, sector concepts, and macroeconomic data research.