Beast Taming and Gardening, Life and Life, Producers and Consumers, together they form the cycle of life.
But merely this is still not enough...
"With birth, naturally, there should be death and when life dies, it is not completely obliterated; it just enters another cycle..."
Life points return to the living, while the Water of Life from the "Black Holy Grail" is recycled for use by the Dead. Big Cat's gift to Lu Ping'an was not merely the opposition between "Energy Producers" and "Energy Consumers", but also the cycle between "Life Sustainers" and "Environmental Inorganics".
Under the whims and favor of fate, Lu Ping'an inherited the "great" legacy of Chris from the start... Of course, it might also be that the world loves its own children, snatching away treasures from the hands of outsiders.