“…Although the mechanism of its formation is still controversial, it is proved in many researches that various plant remains, especially starch grains, could be well-preserved in the calculus after a very long time (Dobney and Brothwell, 1986;Piperno and Dillehay, 2008;Henry and Piperno, 2008;Reinhard et al, 2001;Hardy et al, 2009). Once these plant remains were extracted successfully, they can provide a direct evidence of the plants ingested (Blatt, 2007;Henry et al, 2010;Dietz, 2009;Kashyap and Weber, 2010;Hardy et al, 2012;Mickleburgh and Pagán-Jiménez, 2012;Horrocks et al, 2013;Buckley et al, 2014). Research of this kind can be also conducive to reveal the plant consumption and diet in the Neolithic China.…”