Elon Musk's surprise visit to China this week won concessions for Tesla but left India feeling spurned after he cancelled a scheduled trip there for earlier this month, with Indian commentators calling the move a snub. India's pained reaction highlights the increasing rivalry between India and China, Asia two largest countries by population and among the region's most dynamic economies. Musk was due to meet Modi last week and announce an investment of up to $3 billion in a car plant, but cancelled saying there were "very heavy Tesla obligations".