Editor's note: The Ministry of Commerce on Monday termed US investigation into Chinese intellectual property practices "irresponsible" and "biased". Washington's protectionist, unilateral approach to bilateral trade issues, it said, risks undermining the progress made by both sides during earlier negotiations and sending out the "wrong signals". Three experts shared their views on the issue with China Daily's Cui Shoufeng. Excerpts follow:

No need to panic or overreact

Li Haidong, a professor at the Institute of International Relations, China Foreign Affairs University