The System Is On: I Will Deliver Express to the Underworld!

My name is Jiang Zicheng, and I am a high school student. In order to take care of my mother who has cancer, I decided to drop out of school and find a job to support my family. By chance, I got a jade pendant in the hospital, but I didn't expect that the Tianshi system was hidden in this small jade pendant! After that, I started my cheating journey of delivering couriers to the underworld. To say that I deliver couriers is better to say that I take my own life, because... I only deliver couriers to the dead! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.