Add kernel for build with model tabs get kernel http://crewrktablets.arctablet.com/?page_id=240 replace http://crewrktablets.arctablet.com/?wpfb_dl=179 with url your model tabs:
curl -0 http://crewrktablets.arctablet.com/?wpfb_dl=179 > kernel.7z
7z e kernel.7z
mv kernel.img ~/android/system/device/rockchip/rk29board/kernel