China is urging the United States and North Korea to seize the moment and take positive steps so that six-party talks on the North's nuclear program can resume quickly.

China's U.N. Ambassador Zhang Yesui called last month's talks between senior U.S. and North Korean officials a positive development.

China is assuming the rotating presidency of the Security Council this month.

At a news conference Tuesday, Zhang said the most important thing now is for the key parties to "meet each other halfway so that ... the six-party talks will start as soon as possible."

Washington and Pyongyang agreed on the need to resume the stalled talks. But the North cited unspecified differences and did not make a firm commitment on when it would rejoin the six-party negotiations.