Because the quality of this drama itself is very good. In 2017, several popular suspense dramas were released, such as "White Night", "Undocumented Crime", "River God", etc. The rigorous plot and performances by talented actors made this drama popular.

These dramas themselves are all online dramas without publicity. Unlike some popular dramas that start promotion a few months before they are aired, these dramas are silent until they are aired and no one pays attention to them. With their quality, Slowly fermented, it was updated to more than ten episodes before it started to become popular on the Internet. The popularity of these small online dramas is not due to publicity or any credit to the popular actors. It is really the quality that attracts more and more viewers. . This proves that every actor in "Undocumented Crime" is an actor who acts with heart. The crew prepared all the scenes of persuasion to perfection, which is why this drama is so popular and has a high reputation. .

The characters of domestic young actors are relatively simple. Among those who can be called "handsome", Zhang Yishan is one, and the male protagonist Yan Liang played by Qin Hao in "Undocumented Crime" is also one. , there are very few police officers who fight with each other when they come up. They are both smart and ruthless, aggressive and proactive, but they have a "don't care" face. Others take their analysis seriously, but he dismisses it by saying "rely on the zodiac sign", while others don't care. He spared no detail.

In "Undocumented Crime", I saw Yan Liang, who was born to be a police officer, and I also saw Luo Wen, an extremely smart and evil forensic doctor. One is more bloodthirsty than the criminal, and the other is better than the murderer. Layout, these two main characters are really the essence.

Seriously speaking, this drama does have its flaws. The reason why it is rated so well is that most dramas nowadays aim to please young people. If the audience likes love, then love, and if they like a domineering president, then they will be domineering. There are too few film and television dramas that are as good at character design and plot as this one. Among the many film and television dramas that deal with and please the audience, "Undocumented Crime" definitely stands out.