By Tsering Dhundup DHARAMSHALA, April 28: China on Friday said it would talk only with the representatives of the Dalai Lama and not the officials of the Tibetan government-in-exile, also ruling out dialogue on the long-pending demand for autonomy for Tibetan people.  Chinese Foreign Ministry spokesperson Wang Wenbin refuted reports of back-channel discussions between the Tibetan government-in-exile and the Chinese government