iPhone XR和iPhone XS Max在屏幕尺寸、屏幕材质、后置摄像头等方面，都是不同的。由于iPhone XR的配置进行了缩减，所以相对来说，价格也更便宜。
I have two branches master and exp i tried to cherry pick some of the commit in the exp to master.I am getting
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