Jing Yichen was now free to carry out his plan after hearing what Shangguan Ning said. He had wanted to remove Shangguan Zheng off the Deputy Mayor's position for a long time now, because the longer he stayed in a powerful position, the more harm he would bring to Shangguan Ning, mercilessly.
To remove Shangguan Zheng would mean removing a major potential danger.
...
On a dark night, Shangguan Zheng who was in deep sleep, suddenly felt a chill. He opened his eyes and found that the windows of his bedroom were open.
"Is it windy tonight?" He mumbled in annoyance, and then gave a nudge to his wife who was sleeping soundly beside him. She didn't move so he had to get up to close the window.
Suddenly a sinister voice spoke from behind his back, startling Shangguan Zheng!
"Mayor Shangguan is finally awake, else I would have had to use the knife to wake you up."