add alpha test link
add alpha test link

sdkbox/sdkbox-sample-sdkboxplay,sdkbox/sdkbox-sample-sdkboxplay,sdkbox/sdkbox-sample-sdkboxplay,sdkbox/sdkbox-sample-sdkboxplay,sdkbox/sdkbox-sample-sdkboxplay,sdkbox/sdkbox-sample-sdkboxplay