Stone markings

This tiny museum has stones with markings on them that look like Chinese characters (or animals).

Eighteenth National Congress (十八大):

Shanghai (上海):


Divide the world into three parts (三分天下):


Also animals and the Chinese zodiac:

Horse (马):

I asked the baoan where these stones were found: “Just in the direct area here.” Either some natural miracle, or someone having spent hours or years searching.