BEIJING, Oct 16 (Reuters) - China has achieved comprehensive control over Hong Kong, turning it from chaos to governance, Chinese President Xi Jinping said in a speech on Sunday at the opening of the once-in-five-year Communist Party congress in Beijing.China has also waged a major struggle against Taiwan separatism and is determined and able to oppose territorial integrity, Xi said.Register now for FREE unlimited access to Reuters.comOur Standards: The Thomson Reuters Trust Principles."