Who is the murderer? Why is Cao afraid of mobile phones?

Wu Ming has sent insulting messages to Cao for a long time, insulting her personality and writing, and constantly belittling her. Cao is very familiar with the vibration of mobile phones and has psychological fear.

Because Wu Ming has been torturing Cao with mobile phone vibration for a long time, forcing her to obey herself. The consequence of this is that whenever Cao hears the vibration of the mobile phone, she will have a strong conditioned reflex.

Who is the murderer is a suspense online drama directed by Sun Hao and starring Zhao, Sean and Dong Zijian. This drama mainly tells the story that 16 years ago, the case of the new criminal police was revoked, and 16 years later, the son of the deceased became a criminal police, but the same case happened again.