From a Washington Post editorial:
President Bush spoke up yesterday for democracy in Mongolia, a poor, windswept nation of 2.4 million people that never before had been visited by a U.S. president. Wedged between communist China and authoritarian Russia, Mongolia’s democrats certainly could use the boost they received from Mr. Bush. But it’s striking that a president who dedicated his second term to promoting freedom did not do more of it during his weekend visit to Beijing — where advocating for human rights is more difficult and more urgent.
See also “Bush Skirts Rights Issue” from the Los Angeles Times.