Tuesday's launch marked a milestone in Pyongyang's decades-long drive for the capability to threaten the US mainland with a nuclear strike, and poses a stark challenge for President Donald Trump.
"We also call on relevant parties to stay calm, exercise restraint, refrain from words and deeds that may heighten tensions, and jointly make effort for the easing of tensions," foreign ministry spokesman Geng Shuang told reporters. US Ambassador to the UN Nikki Haley told the UN Security Council on Wednesday that Washington was ready to use force if need be to deal with the threat of a nuclear-armed North Korea.
Her comments came after Trump berated China on Twitter, saying that the country's trade with North Korea had surged by almost 40 percent in the first quarter.
Geng defended China's dealings with North Korea, insisting that Beijing has upheld UN sanction resolutions.