Hidden
As the name suggests, it helps political and business people solve some things they don't want others to know.
This security company was co-founded by four young men aged about 28 years old. 'Yin' is different from ordinary security companies. Not only is it excellent at keeping secrets, but it has never failed since its establishment. They walk on the edge of the law and accept both black and white. As long as your price is reasonable, there is almost nothing they can't accomplish. And those mysterious men who created "hidden" are what people want to see but can't. People only know that they are codenamed by "Che", "Xing", "Ling" and "Feng" respectively.
Of course, they will leave most of the tasks to their other partners, and only a few challenging tasks can arouse their interest.
Therefore, "hidden" has always been a special existence in people's hearts.