10.0 Acknowledgments
Funded by Sichuan and Chongqing Grottoes protection demonstration
project (Dazu Rock Carving Niche of Sakyamuni Entering Nirvana and Small
Fowan statues conservation and restoration project) undertaken by the
Chinese Academy of Cultural Heritage, as well as by the basic scientific
research service fee of the Chinese Academy of Cultural Heritage
(2016-JBKY-06).
11.0 Data Availability Statement The data that support the
findings of this study are available from the corresponding author upon
reasonable request.