Ji arranged with the Czerkases to assign accession numbers to three of the most valuable specimens , thus formally adding them to the collection of Chinese Academy of Geological Sciences in Beijing .
Czerkases remain in the possession of the Czerkases .
Ji arranged with the Czerkases to assign accession numbers to three of the most valuable specimens , thus formally adding them to the collection of Chinese Academy of Geological Sciences in Beijing , although they remain in the possession of the Czerkases .