So I was wondering: what would have happened had Zheng Chenggong survived his malaria and continued leading the fleet he had based in Taiwan? Would he have successfully been able to take Manila, and if so, would he have been able to keep it? Would he have been able to continue being a perennial thorn on the side of the Qing? Would the Qing have extended their naval fleets to Luzon if the Zheng family ruled it?