HONOLULU -- China is modernizing its military forces faster than anyone expected only a few years ago, escalating the potential danger to the island of Taiwan, to American forces and bases in Asia, and to the overall balance of power in the region.

"China adheres to the military strategy of active defense and works to speed up the revolution of military affairs with Chinese characteristics," says the white paper Beijing issued in December. It points to "leapfrog development" in high-tech weapons for its missile units, navy and air force.

Where many American and Asian analysts said before that China would be able to mount a credible threat between 2010 and 2015, now they are saying it will come earlier, perhaps by 2006 and certainly by 2012.