BEIJING China is still calling for the U.S. to roll back tariffs as part of any "phase one" agreement, as trade negotiations between the world's two largest economies drag on. "The trade war was begun with adding tariffs, and should be ended by canceling these additional tariffs. This is an important condition for both sides to reach an agreement," China's Ministry of Commerce spokesperson Gao Feng said at a weekly press conference Thursday, according to a CNBC translation.