Based on info what type of primary source is this tablet? Roy is an archeologist during recent dig in China he descovered a tablet

Based on the given scenario above, Roy the archaeologist was able to discover a clay tablet and this clay tablet contained a series of diagrams that describes about the plants and trees and this tablet contained records kept by a renowned gardener from the ancient China. Therefore, this tablet can be an archive or an account of events as the type of primary source.