"Alright, let's go. There's still a tough battle ahead. With these pieces of evidence, we can sufficiently demonstrate that Zhou Xiangrong, through investigating several cases, uncovered the treasure of Sapporo and Minjin,"
When it came time to report up the chain, he found there were issues with the higher-ups. Given his position at the time, he wasn't able to pass the information along and had to hide it instead. He even had An Liwei silence those in the know, hoping to get you out safely."
But it was already too late. The opposition silenced them first, and the whereabouts of the treasure remained unknown. Even An Liwei didn't know the location of the treasure. As for An Liwei's death, I suspect they were also behind it. If An Liwei had been exposed, Zhou Xiaozhou probably wouldn't have survived either."