Jiang Yuan's call was made directly to Song Tiancheng.
If the police hierarchy were simply divided by rank, people like Wu Junhao at the deputy section level would count as LV1, the former Huang Qiangmin was LV2... Song Tiancheng had at least reached the full LV5, or was half a step into LV6.
And when it comes to special case teams, the one led by Song Tiancheng was... unlikely, having exceeded the ceiling already. Therefore, after receiving the call, Song Tiancheng brought people over to supervise and at the same time to understand the progress of the case on Jiang Yuan's end.
This was also facilitated by their proximity in Beijing, which made it considerably convenient.
Police stations often manage to handle major cases, and this advantage of closeness indeed simplifies reporting and communication.
