知乎是一个中文互联网高质量问答社区和创作者聚集的原创内容平台，提供知识共享、互动交流和个人成长机会。

知乎话题广场，汇聚多样化主题，助您探索知识、分享见解。

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ippa 是日本的知识产权缩写,所以你看到右上角的IPPA加一串数字，实际就是 知识产权号。多用于近现代黑色爱情动作电影，日本拍摄的此类电影比较多，短的有十几分钟，长的四五小时都有。