It was written more than 1,300 years ago in a neat hand using ink made of oak-gall nuts mixed with carbon.

1300多年前，一双巧手用橡木汁混合木炭制成的墨水写就了这本巨作。

youdao

It was written more than 1, 300 years ago in a neat hand using ink made of oak-gall nuts mixed with carbon.

1300多年前，一双巧手用橡木汁混合木炭制成的墨水写就了这本巨作。

youdao