1. Institute for Preservation and Conservation of Chinese Ancient Books, Fudan University, Library, Fudan University, 220 Handan Road, Shanghai 200433, China
2. Shanghai Institute of Quality Inspection and Technical Research, 900 Jiang Yue Road, Shanghai 201114, China
3. Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2005 Songhu Road, Shanghai 200438, China