亚马逊1个listing能有多少个Asin

根据亚马逊SP-API在Github的文档，一个listing最多能绑定3个Asin。

为什么是3个

根据亚马逊的公开文档以及Github上的reference，你可以获取自己的Listing数据。而在这些listing的数据中可以清晰的看到，每个listing拥有1个独立的id，以及3个asin的修改空间，listing数据格式如下：

sample_return = {
    "listingId" : "",
    "merchantShippingGroup" : "",
    "openDate" : "",
    "pendingQuantity" : "",
    "price" : "",
    "productId" : "",
    "productIdType" : "",
    "quantity" : "",
    "sellerSku" : "",
    "status" : "",
    "willShipInternationally" : "",
    "zshopBoldface" : "",
    "zshopBrowsePath" : "",
    "zshopCategory1" : "",
    "zshopShippingFee" : "",
    "zshopStorefrontFeature" : "",
    "minimumOrderQuantity" : "",
    "sellRemainder" : "",
    "addDelete" : "",
    "asin1" : "",
    "asin2" : "",
    "asin3" : "",
    "bidForFeaturedPlacement" : "",
    "expeditedShipping" : "",
    "fulfillmentChannel" : "",
    "imageUrl" : "",
    "itemCondition" : "",
    "itemDescription" : "",
    "itemIsMarketplace" : "",
    "itemName" : "",
    "itemNote" : ""
}