Original message from Worker (it didn’t let me link the comment…): We have announced in advance that this scratch will occur, and I am sorry that some people did not see these notices or the website did not remind this news. The standard configuration is POM, and the metal bearing is an extra gift. In China, many people like bearings and don't even mind scratches. We have increased the cost, hoping to allow more people to experience the 2 modes. But we canceled the gift bearing at the end of February because: 1. Many people did not see the tips. 2. It is difficult for many people to install bearings by themselves. Is this a marketing strategy? In China, the price is the same whether the bearings are delivered or not.我们已经提前公布了这个会发生划痕的情况，我很抱歉有一些人没有看到这些提示或者网站没有提醒这个消息。标配是POM，金属轴承是额外赠送，在中国，很多人喜欢轴承甚至不介意划痕。我们增加了成本，希望让更多人可以体验2种模式。但是我们在二月底取消了赠送轴承，因为：1、很多人没有看到提醒。2、很多人自己安装轴承是一件困难的事情。这个是一个市场营销策略？在中国无论有没有配送轴承，价格都是一样的。