the National Social Science Foundation of China under Grant 19BYY171;the Fundamental Research Funds for the Central Universities under Grant XDJK2013C117;Ph.D.Fund of Southwest University No.20130553;China Postdoctoral Science Foundation under Grant 2015M580765;Chongqing Postdoctoral Science Foundation under Grant Xm2016041;Chongqing Natural Science Foundation(cstc2019jcyj-msxmX0130);Chongqing City science and technology education research projects(KJQN201801901).
Ancient books that record the history of different periods are precious for human civilization.But the protection of them is facing serious problems such as aging.It is significant to repair the damaged characters in ...