n. (Trad=蔥, Pinyin=cong1) scallion, green onion

xiao3 cong1 ban4 dou4 fu4... yi4 qing1 er4 bai2
A little onion mixed with toufu... one is green but the two are white.
When the ingredients are mixed, the colours will change. Completely innocent. As simple as a dish of white beancurd and scallions.