PHNOM PENH, Cambodia — The Obama administration pressed Beijing on Thursday to accept a code of conduct for resolving territorial disputes in the resource-rich South China Sea, a difficult U.S. mediation effort that has faced resistance from the communist government — although it has endeared the U.S. to once-hostile countries in Southeast Asia.

U.S. Secretary of State Hillary Rodham Clinton met with Chinese Foreign Minister Yang Jiechi on the sidelines of the Association of Southeast Asian Nations' annual conference.

Sitting across from each other at a long table in a grand hall with chandeliers, Clinton stressed the different ways Washington and Beijing are cooperating. Yang spoke of building an even closer U.S.-Chinese relationship. Neither side spoke about the South China Sea while reporters were allowed in the room.