diff --git a/relay/model/message.go b/relay/model/message.go
index 86ee57b3..bd30676b 100644
--- a/relay/model/message.go
+++ b/relay/model/message.go
@@ -9,12 +9,21 @@ import (
 type Message struct {
 	Role string `json:"role,omitempty"`
 	// Content is a string or a list of objects
-	Content          any           `json:"content,omitempty"`
-	ReasoningContent string        `json:"reasoning_content,omitempty"`
-	Name             *string       `json:"name,omitempty"`
-	ToolCalls        []Tool        `json:"tool_calls,omitempty"`
-	ToolCallId       string        `json:"tool_call_id,omitempty"`
-	Audio            *messageAudio `json:"audio,omitempty"`
+	Content    any           `json:"content,omitempty"`
+	Name       *string       `json:"name,omitempty"`
+	ToolCalls  []Tool        `json:"tool_calls,omitempty"`
+	ToolCallId string        `json:"tool_call_id,omitempty"`
+	Audio      *messageAudio `json:"audio,omitempty"`
+	// -------------------------------------
+	// Deepseek 专有的一些字段
+	// https://api-docs.deepseek.com/api/create-chat-completion
+	// -------------------------------------
+	// Prefix forces the model to begin its answer with the supplied prefix in the assistant message.
+	// To enable this feature, set base_url to "https://api.deepseek.com/beta".
+	Prefix *bool `json:"prefix,omitempty"` // ReasoningContent is Used for the deepseek-reasoner model in the Chat
+	// Prefix Completion feature as the input for the CoT in the last assistant message.
+	// When using this feature, the prefix parameter must be set to true.
+	ReasoningContent *string `json:"reasoning_content,omitempty"`
 }
 
 type messageAudio struct {