China will introduce stricter air pollution standards next year to monitor tiny particles of pollution in Beijing and other cities, but it may not start releasing the results to the public until 2016, state news media reported Thursday. Chinese cities do not measure data on the smaller particles, 2.5 microns in diameter or less, from smokestacks and exhaust pipes that shroud many cities in acrid smog, and many Chinese have complained that official statistics vastly understate the problem.