$v_2$ in high-multiplicity pp collisions. $p_{ rm T}$-differential $v_2$ measured with two-particle correlation for mesons ($\pi^\pm$, ${\rm K}^\pm$, ${\rm K}^0_{\rm S}$) and baryons (${\rm p}^+\bar{\rm p}$, $\Lambda+\bar{\Lambda}$) in high-multiplicity pp collisions at $\sqrt{s} = 13$ TeV. Horizontal bars (boxes) represent the statistical (systematic) uncertainties. Comparisons with the calculations from the Hydro-Coal-Frag model (left) and the Hydro-Frag model (right) are also presented. Only statistical uncertainties are shown for the calculations.