The Panchen Lama is a tulku of the Gelug school of Tibetan Buddhism. The Panchen Lama is one of the most important figures in the Gelug tradition, with its spiritual authority second only to the Dalai Lama. From Wikipedia
Tibetan groups, rights organizations, and Swiss lawmakers urge China to disclose the whereabouts of Gedhun Choekyi Nyima, missing since 1995, and to respect religious freedoms.