“The identity of organic tea in Yunnan Pu'er Plateau is difficult to distinguish. The research team constructed a "discriminant function equation: y=-0.081 (tea δ 15N)+0.819 (tea δ 13C)+0.093 (soil total nitrogen)+2.117 (soil total carbon) -0.155 (soil organic carbon)+2.870 (soil pH)+4.232, y<0.5 is conventional tea" model, with an identification accuracy of 92.3%, providing a new tool for tracing the origin of organic tea.”