Helping King Zhao ascend to the Imperial View was not a spur-of-the-moment decision for Wei Yuan; it was a crucial step in a series of plans.
The source of Zhang Sheng's slashing tribulation began in Ji Country, and the immortals' layout in Ji Country is already quite obvious—it is indeed reducing people. Although this layout may not be directly related to Zhang Sheng's slashing tribulation, the masterminds are likely the same group of immortals.
Wei Yuan does not know what these immortals' plan to reduce people is for; asking Yan Shi and Bai Kaishui yields no answers either. However, since he knows their intention to reduce people, Wei Yuan must prepare in advance and find ways to add people.
Although it's only been a year, and the changes in the eight southern counties of Western Jin have just begun, should the black hands behind the scenes try to reduce people in Western Jin again, the karma they would gain would have multiplied.
