Securities Announcements

Query security announcements in the market data service, supporting filtering and searching by security code, date range, and keywords. Users can input security codes (e.g., '920000.BJ'), announcement keywords (e.g., 'annual report'), and date ranges (e.g., '2024-10-25' to '2025-10-25') to quickly obtain detailed information about relevant announcements, including announcement date, security code, security name, release time, announcement title, announcement link, and unique identifier.