The real problem is their reliability. China suffers from the same inadequacies of reliability that Russia suffers. Especially when it comes to military technology. While they may have fifth generation fighters they don’t have the quantity or the quality of component tree. They don’t do night carrier landings or aired air combat tactics like red flag. They also are a society build on constantly growing. They are essentially the same power as the Soviet union a giant military complex that requires that sums of money to maintain prosperity. In the long run they cannot compete with capitalism so the hope is they can starve out the west