This drama is intense and a masterpiece. It's only 12 episodes.
On the Chinese platform IQIYI so hurry while it's still free.
https://www.iq.com/play/19rrhl1l3l
A story that follows three children from a coastal town who unintentionally film a murder scene. As the kids become involved with the suspect, it opens up a case that is far more complicated than it looks and entraps several families into an unpredictable outcome.