If China is hoping to actually achieve superiority, though, in order to eventually conquer the island, it is not going to work. This is because Taiwan will respond to all moves by China to increase its threat over Taiwan, such as by buying F-16s as they are currently considering. If China wants Taiwan to buy F-16s, this is the perfect ploy.
Maintaining rough deterrence should be the rational goal of both sides. Sure, Taiwan wants to be independent, and China wants to retake Taiwan, but I can't imagine either considers those goals to worth the costs. With that in mind, why is China needlessly increasing the costs, especially when Taiwan has signaled (through not buying everything America is willing to give it) that it is fine with the level of deterrence China has over it?