Infinitely many solutions for the prescribed boundary mean curvature problem on $\mathbb B^N$

We consider the following prescribed boundary mean curvature problem in $\mathbb B^N$ with the Euclidean metric $-\Delta u =0$, $u>0$ in $B^N, \frac{\partial u}{\partial\nu} + \frac{N-2}{2} u =\frac{N-2}{2} K(x) u^{N/(N-2)}$ on $S^{N-1}, where$K$is positive and rotationally symmetric on$\mathbb S^{N-1}$. We show that if${K}$has a local maximum point, then the equation has {\bf infinitely many positive} solutions, which are non-radial on$\mathbb S^{N-1}$.