ZhuHongrun

[Question]: When I use HTTP API to retrieve chunks, why do I get strange results (as shown in the picture)? For example: \u6280

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### Describe your problem I want to input the chunks retrieved by RAGFlow into LLM, then I followed the guide at https://ragflow.io/docs/dev/http_api_reference#retrieve-chunks. 

[Question]: In v0.19.0, In addition to the General chunking method, other methods(like Presentation) still cannot be parsed using the VLM model, and this problem does not seem to be solved.

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### Self Checks - [x] I have searched for existing issues [search for existing issues](https://github.com/infiniflow/ragflow/issues), including closed ones. - [x] I confirm that I am using English to submit this...