Ministry spokesman Lu Kang also expressed skepticism over calls by the US for tough new sanctions against North Korea over its January 6 nuclear test.
"We hope all sides show restraint and take prudent action to avoid any moves that may increase the tensions on the (Korean) Peninsula," Lu told reporters at a regularly scheduled news briefing.
Lu's comments come as US diplomats are urging China to use its political and economic influence with North Korea to compel it to stop such actions.
Maintaining peace and stability on the Korean Peninsula is the shared responsibility and common interest of all parties, Lu said.
"China will engage in contact and coordination with each related side, and play a constructive role in maintaining the peace and stability of the peninsula and this region," he said.
North Korea's announcement came during a visit to Pyongyang by China's top envoy to North Korea, Wu Dawei. That could be seen as a snub to Beijing, North Korea's most important ally which, nevertheless, has been unable to restrain Pyongyang's actions.
