diff --git a/dto/openai_request.go b/dto/openai_request.go
index a918b4185..a6fc3f66b 100644
--- a/dto/openai_request.go
+++ b/dto/openai_request.go
@@ -56,10 +56,10 @@ type GeneralOpenAIRequest struct {
 	Tools               []ToolCallRequest `json:"tools,omitempty"`
 	ToolChoice          any               `json:"tool_choice,omitempty"`
 	FunctionCall        json.RawMessage   `json:"function_call,omitempty"`
-	User                string            `json:"user,omitempty"`
+	User                json.RawMessage   `json:"user,omitempty"`
 	// ServiceTier specifies upstream service level and may affect billing.
 	// This field is filtered by default and can be enabled via channel setting allow_service_tier.
-	ServiceTier string          `json:"service_tier,omitempty"`
+	ServiceTier json.RawMessage `json:"service_tier,omitempty"`
 	LogProbs    *bool           `json:"logprobs,omitempty"`
 	TopLogProbs *int            `json:"top_logprobs,omitempty"`
 	Dimensions  *int            `json:"dimensions,omitempty"`
@@ -67,7 +67,7 @@ type GeneralOpenAIRequest struct {
 	Audio       json.RawMessage `json:"audio,omitempty"`
 	// 安全标识符，用于帮助 OpenAI 检测可能违反使用政策的应用程序用户
 	// 注意：此字段会向 OpenAI 发送用户标识信息，默认过滤，可通过 allow_safety_identifier 开启
-	SafetyIdentifier string `json:"safety_identifier,omitempty"`
+	SafetyIdentifier json.RawMessage `json:"safety_identifier,omitempty"`
 	// Whether or not to store the output of this chat completion request for use in our model distillation or evals products.
 	// 是否存储此次请求数据供 OpenAI 用于评估和优化产品
 	// 注意：默认允许透传，可通过 disable_store 禁用；禁用后可能导致 Codex 无法正常使用
@@ -100,10 +100,10 @@ type GeneralOpenAIRequest struct {
 	THINKING json.RawMessage `json:"thinking,omitempty"`
 	// pplx Params
 	SearchDomainFilter     json.RawMessage `json:"search_domain_filter,omitempty"`
-	SearchRecencyFilter    string          `json:"search_recency_filter,omitempty"`
+	SearchRecencyFilter    json.RawMessage `json:"search_recency_filter,omitempty"`
 	ReturnImages           *bool           `json:"return_images,omitempty"`
 	ReturnRelatedQuestions *bool           `json:"return_related_questions,omitempty"`
-	SearchMode             string          `json:"search_mode,omitempty"`
+	SearchMode             json.RawMessage `json:"search_mode,omitempty"`
 	// Minimax
 	ReasoningSplit json.RawMessage `json:"reasoning_split,omitempty"`
 }
@@ -836,7 +836,7 @@ type OpenAIResponsesRequest struct {
 	PromptCacheRetention json.RawMessage `json:"prompt_cache_retention,omitempty"`
 	// SafetyIdentifier carries client identity for policy abuse detection.
 	// This field is filtered by default and can be enabled via channel setting allow_safety_identifier.
-	SafetyIdentifier string          `json:"safety_identifier,omitempty"`
+	SafetyIdentifier json.RawMessage `json:"safety_identifier,omitempty"`
 	Stream           *bool           `json:"stream,omitempty"`
 	StreamOptions    *StreamOptions  `json:"stream_options,omitempty"`
 	Temperature      *float64        `json:"temperature,omitempty"`
@@ -844,8 +844,8 @@ type OpenAIResponsesRequest struct {
 	ToolChoice       json.RawMessage `json:"tool_choice,omitempty"`
 	Tools            json.RawMessage `json:"tools,omitempty"` // 需要处理的参数很少，MCP 参数太多不确定，所以用 map
 	TopP             *float64        `json:"top_p,omitempty"`
-	Truncation       string          `json:"truncation,omitempty"`
-	User             string          `json:"user,omitempty"`
+	Truncation       json.RawMessage `json:"truncation,omitempty"`
+	User             json.RawMessage `json:"user,omitempty"`
 	MaxToolCalls     *uint           `json:"max_tool_calls,omitempty"`
 	Prompt           json.RawMessage `json:"prompt,omitempty"`
 	// qwen
diff --git a/relay/channel/baidu/dto.go b/relay/channel/baidu/dto.go
index 426f63f54..4fa73f89c 100644
--- a/relay/channel/baidu/dto.go
+++ b/relay/channel/baidu/dto.go
@@ -1,6 +1,7 @@
 package baidu
 
 import (
+	"encoding/json"
 	"time"
 
 	"github.com/QuantumNous/new-api/dto"
@@ -12,16 +13,16 @@ type BaiduMessage struct {
 }
 
 type BaiduChatRequest struct {
-	Messages        []BaiduMessage `json:"messages"`
-	Temperature     *float64       `json:"temperature,omitempty"`
-	TopP            float64        `json:"top_p,omitempty"`
-	PenaltyScore    float64        `json:"penalty_score,omitempty"`
-	Stream          bool           `json:"stream,omitempty"`
-	System          string         `json:"system,omitempty"`
-	DisableSearch   bool           `json:"disable_search,omitempty"`
-	EnableCitation  bool           `json:"enable_citation,omitempty"`
-	MaxOutputTokens *int           `json:"max_output_tokens,omitempty"`
-	UserId          string         `json:"user_id,omitempty"`
+	Messages        []BaiduMessage  `json:"messages"`
+	Temperature     *float64        `json:"temperature,omitempty"`
+	TopP            float64         `json:"top_p,omitempty"`
+	PenaltyScore    float64         `json:"penalty_score,omitempty"`
+	Stream          bool            `json:"stream,omitempty"`
+	System          string          `json:"system,omitempty"`
+	DisableSearch   bool            `json:"disable_search,omitempty"`
+	EnableCitation  bool            `json:"enable_citation,omitempty"`
+	MaxOutputTokens *int            `json:"max_output_tokens,omitempty"`
+	UserId          json.RawMessage `json:"user_id,omitempty"`
 }
 
 type Error struct {
diff --git a/relay/channel/coze/dto.go b/relay/channel/coze/dto.go
index d5dc9a813..da01bbb6c 100644
--- a/relay/channel/coze/dto.go
+++ b/relay/channel/coze/dto.go
@@ -17,7 +17,7 @@ type CozeEnterMessage struct {
 
 type CozeChatRequest struct {
 	BotId              string             `json:"bot_id"`
-	UserId             string             `json:"user_id"`
+	UserId             json.RawMessage    `json:"user_id"`
 	AdditionalMessages []CozeEnterMessage `json:"additional_messages,omitempty"`
 	Stream             bool               `json:"stream,omitempty"`
 	CustomVariables    json.RawMessage    `json:"custom_variables,omitempty"`
diff --git a/relay/channel/coze/relay-coze.go b/relay/channel/coze/relay-coze.go
index e120164c0..69ebd8a68 100644
--- a/relay/channel/coze/relay-coze.go
+++ b/relay/channel/coze/relay-coze.go
@@ -34,8 +34,8 @@ func convertCozeChatRequest(c *gin.Context, request dto.GeneralOpenAIRequest) *C
 		}
 	}
 	user := request.User
-	if user == "" {
-		user = helper.GetResponseID(c)
+	if len(user) == 0 {
+		user = json.RawMessage(helper.GetResponseID(c))
 	}
 	cozeRequest := &CozeChatRequest{
 		BotId:              c.GetString("bot_id"),
diff --git a/relay/channel/dify/dto.go b/relay/channel/dify/dto.go
index cb127554d..b4029a0ca 100644
--- a/relay/channel/dify/dto.go
+++ b/relay/channel/dify/dto.go
@@ -1,6 +1,8 @@
 package dify
 
-import "github.com/QuantumNous/new-api/dto"
+import (
+	"github.com/QuantumNous/new-api/dto"
+)
 
 type DifyChatRequest struct {
 	Inputs           map[string]interface{} `json:"inputs"`
diff --git a/relay/channel/dify/relay-dify.go b/relay/channel/dify/relay-dify.go
index 6c7814489..bec135b87 100644
--- a/relay/channel/dify/relay-dify.go
+++ b/relay/channel/dify/relay-dify.go
@@ -131,10 +131,16 @@ func requestOpenAI2Dify(c *gin.Context, info *relaycommon.RelayInfo, request dto
 	}
 
 	user := request.User
-	if user == "" {
-		user = helper.GetResponseID(c)
+	if len(user) == 0 {
+		user = json.RawMessage(helper.GetResponseID(c))
 	}
-	difyReq.User = user
+	var stringUser string
+	err := json.Unmarshal(user, &stringUser)
+	if err != nil {
+		common.SysLog("failed to unmarshal user: " + err.Error())
+		stringUser = helper.GetResponseID(c)
+	}
+	difyReq.User = stringUser
 
 	files := make([]DifyFile, 0)
 	var content strings.Builder