They needed us only to establish their manufacturing base and modern financial and distribution systems. Whether or not this disease cluster was engineered, China will eventually become fully self sufficient and external trading partners will no longer be an impediment to invading Taiwan or the world.
If history tells me anything it's not to murder the people who grow your food. When the Soviet Union took control of the farming in Russia, they called the co-ops I think. The Russians nearly starved to death.
Whether or not this disease cluster was engineered, China will eventually become fully self sufficient and external trading partners will no longer be an impediment to invading Taiwan or the world.
They can be self-sufficent till the cows come home, but, without someone to buy their goods...they have no money to further their goal. Should we fall either through ethnic cleansing or an economic collapse...they will too.