Us China Policy --NPR's Ted Clark reports on recent improvements in relations between the US and China. The State Department has praised China's efforts to curb the spread of nuclear weapons. A Chinese company was scheduled to sell a chemical to Iran that would help in the preparation of uranium. Chinese authorities have stopped delivery of the chemical. And for the first time in eight years, the U-S will not sponsor a U-N resolution critical of China's human rights record. Washington points out that China has released some prominent political prisoners.