面向中国 A 股的 Tushare 专用技能，提供股票数据获取、个股分析与交易观察能力。
- Updated skill name and description to focus clearly on China A-share stock research and analysis, with all user-facing text in Simplified Chinese. - Revised documentation to clarify the core scenarios, values, usage boundaries, and exclude non-A-share market workflows. - Streamlined examples, command references, and explanation style for more concise, practical guidance. - No functional or code changes; this update is a full documentation and localization improvement.