India faces a greater threat from China than Pakistan because New Delhi knows little about Beijing's combat capabilities, India's air force chief told a newspaper in an interview published on Sunday. The world's two most populous nations fought a brief but brutal war over their 3,500 km (2,200 mile) Himalayan border in 1962, and both sides claim the other is occupying big but largely uninhabited chunks of their territory. India has also been pursuing closer relations with the United States, something that worries China. China has a standing army almost three times the size of Pakistan's, according to official figures and defence industry estimates, but it is the lack of knowledge about China's military that concerned Air Chief Marshal Fali Homi Major.