China urged countries to keep seeking a diplomatic solution to the Iran nuclear standoff on Thursday, even as the international confrontation over Iran's nuclear enrichment escalated. "We're extremely concerned about the status of the Iranian nuclear issue," Chinese Foreign Ministry spokesman Qin Gang told a regular news briefing. "It's extremely important for the international community to uphold the consensus on resolving the Iran nuclear issue through diplomatic means and call on the related parties to maintain calm, restraint and patience."