欧美日韩性大香蕉|精品无码成人视频|永久久久久久久久|日韩加勒比偷拍网|婷婷伊人久久蜜桃|亚洲理论中文字幕|中文无码黄色Av|三级一区二区三区|超碰在线精品专区|国语对白一级A片

Home / Culture / Heritage

Great efforts needed to restore ancient books

(Ecns.cn) Updated: 2016-02-26 10:03 Comments

Great efforts needed to restore ancient books

Ancient books are being restored and preserved at the Gansu Ancient Books Restoration Center. China is estimated to have over 10 million ancient books that wear out for various reasons, such as rat bites and humidity. A staff member at the center can restore about ten destroyed pages a day at most. [Photo/China News Service]

Previous Page 1 2 3 4 5 6 Next Page

Most Popular
...