Overview
百度贴吧（Baidu Tieba）是中国最大的中文社区论坛，按话题分吧。适合找技术讨论、产品评价、爱好者社区等内容。无需 API key，免费。
When to Choose It
- 查中文用户对特定产品/工具的讨论
- 找特定兴趣圈（游戏吧、数码吧、编程吧）的社区帖子
- 当 zhihu/xiaohongshu 没有足够覆盖时的补充
How To Search
Uses tieba.baidu.com/f/search/res search endpoint with HTML parsing via trafilatura.
Quality Bar
- Evidence items have non-empty title and url.
- No crash on empty or malformed HTML response.
- Source channel field matches "tieba".
- Baidu safety verification / captcha pages are anti-scrape blocks; treat them as transient platform blocks, not user auth failures.
- Production use should treat Tieba as anti-scrape-prone and not rely on it as an always-available channel.