效率的提升，并不是少写了代码，而是减少了反复试错和信息查找的时间。
"message": "Amount must be non-zero."
，详情可参考safew官方下载
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The library project, on the other hand, contains the actual core gameplay logic. In the inventory service's case, this includes the C# classes that model the request and response for every API operation as well as the underlying logic for handling the countless inventory related systems such as crafting, quests, loot, etc. As a separate project, the library can be imported in other services when we need to reuse that logic without pulling in any of the web project's code.