To alter the ecosystem of an entire planet was no child's play. There were three essential things: Energy, manpower, and resource.
Energy was not an issue. Chen Jin had his hands on the 'Dark Lady of the Nine Heavens', four 500 MW nuclear fission reactors, and several windpower generation facilities. In addition, there were countless salvagable wind, water, fire, and solar power generators scattered throughout the planet. Considering all of those generators as options as well, the energy supply was endless.
Manpower was not a problem, either, as robots could simply be created on demand. Even making tens of millions of them would be a piece of cake.
