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Our concerned team is running a project on this to help optimize our approach, and have not yet finalized any communication, but that is still in progress.
As of now this is working as designed, the system ignores any generic keywords over 250 bytes for all the categories including health and personal and beauty.
In addition, we were also informed that
our system do not do partial matching of Generic Keywords fields and it is unlikely that anyone will search for paragraphs of keywords in their entirety.
所有商品类别包含了（Health and Personal）和（Beauty）类别，如果你的关键词（Generic Keywords）
超过 250个字元，系统会忽略超过的部份
。另外，由于一般搜索并不会输入长篇大论的关键词（Paragraphs of Keywords），所以在
一般关键词（Generic Keywords）的部份系统也不会做部份批配（Partial Matching），而是做精准批配
。
AS per the help seller can put 1000 characters but our system can index only 250 characters at maximum.
Please know that we currently do not have an option of indexing the keywords to more than 250 characters.
I apologize if this policy doesn’t meet your business needs.
虽然现在 Search Term 每行可以填入 1000个字元，但系统最多只能把 250个字元编入索引范围。非常抱歉，我们现在没有办法索引超过 250个字元。
剩下的比较官腔，在说明此位卖家提出需要索引超过250个字元的需求，但被亚马逊拒绝的故事，大家自己看看：
I do understand that this may help you for better buyer experience. However, at this time, this feature is not available for our sellers.
As to make sure that you are heard, I have passed your message to the Business team as a feedback, so they are aware of your interest.
As we continue to improve both our platform and our service, input from Sellers like you is valuable. I truly appreciate your suggestion as this is a great input for Amazon to work upon and this can actually be of great help to Sellers as well as Buyers.
If there are changes pertaining to this, Sellers will be notified via Seller Central. We encourage you to keep checking, as functionality is often refined over time.
We strive to make your selling experience on Amazon as eventful as possible and therefore we are willing to extend any help that you may need at any time.
