Even though Xi Jiaxin had been suspected before,
it was still shocking to discover that he was the mastermind, committing unspeakable crimes against heaven and reason.
The Great Wall Drug Factory had long been a drug-making den.
Xi Jiaxin had been dealing in drug trafficking all this while.
But he was very secretive and had never exposed his identity.
He only communicated with the drug maker.
No one else knew anything.
Later, when the incident occurred, the place where the drug maker was hiding was also arranged by Xi Jiaxin.
Gu Zhaohan knew the whereabouts of the drug maker, but it was not because he was colluding with drug dealers.
Instead, he somehow learned of the drug maker's movements through a third party.
After Xi Jiaxin found out, he silenced the drug maker by killing him.
But the drug maker had been cautious from the start.
He left the crucial evidence with a friend,
saying that if he died, the evidence should be given to the police.
