Siyang Fangzun, the four-goat square zun vessel dating to the Shang Dynasty (c.16th century-11th century BC), is one of the most precious pieces of archaic bronzework excavated in the country. The ceremonial ware represents the height of the smelting and casting techniques of the time, as well as the artistry and establishment of social etiquette.

The National Museum of China, where Siyang Fangzun is housed, has enriched people's experiences appreciating the vessel by offering a new product called "Archaeological Chocolate". It allows buyers the feelings of working at an excavation site by "digging" a piece of chocolate in the shape of Siyang Fangzun from a jar of chocolate chips.

The chocolate is the latest in a series of food products created by the National Museum to promote cultural heritage in its collection and ongoing exhibitions. For example, the museum's cafeterias offer "Drunken Concubine" lattes to go with an exhibition about Mei Lanfang, the Peking Opera master. The theme is derived from a famous piece performed by Mei and features milk art of a peony to accentuate the grandeur and grace in Mei's performance.