Complex sentence: However, they reported that their Chinese counterparts were not interested in discussing the situation in Tibet, and that they maintained that the Dalai Lama only had the authority to negotiate for the personal status and future of the 14th Dalai Lama.
Split into simpler sentences: However, they reported that their Chinese counterparts were not interested in discussing the situation of Tibet. Their only concern was the personal status and future of the 14th Dalai Lama.