A man from eastern China’s Shandong province has spent more than 20 years engraving stamps on ancient bricks, local media reported.

Chinese zodiacs, ancient figures, and literature works, are all the materials for his engraving.

According to the man, Tang Fuhe, he has a 2,500-year-old brick that traces back to the Qin Dynasty. He engraved all six sides of the brick, and he considers it his most valuable treasure.

He also has many other ancient bricks with more than 200 years of history.

Since it is hard to find new bricks nowadays, Tang has sealed his engraved bricks with mud, a convention that was popular in the Western Han Dynasty (206 B.C.-A.D. 24).

Now Tang is running a carving stand in a local commercial district. Though he is not making a huge amount of money, he enjoys introducing traditional culture and history to visitors.