The United States has said it would not be pressured into direct talks with North Korea, despite Pyongyang's apparent readiness to test an intercontinental ballistic missile.
"This is not the way to do business in the world," US President George W Bush said on Wednesday while at an EU summit in Vienna.
"The North Koreans have made agreements with us in the past and we expect them to keep their agreements, for example on test launches," Bush said.
He said the issue must be dealt with in six-party talks on North Korea and he was "pleased" the Chinese government was speaking out against any test.
North Korean media hailed for the second time this week the 1998 launch of a missile over Japan, stoking worldwide concern that the Stalinist state plans a repeat.
State radio praised the firing of the Taepodong-1 missile into the Pacific Ocean eight years ago as a feat of science, in a commentary monitored by Tokyo-based service Radiopress.
The commentary did not mention the possible firing of a Taepodong-2, which Japan and the United States fear could occur at any time.
The multi-stage Taepodong-2 is believed to have a range of up to 6,700 km, enough to hit Alaska and possibly Hawaii.