diff --git a/api/controllers/console/datasets/datasets.py b/api/controllers/console/datasets/datasets.py
index 6532e046c9..fed304f728 100644
--- a/api/controllers/console/datasets/datasets.py
+++ b/api/controllers/console/datasets/datasets.py
@@ -79,7 +79,7 @@ class DatasetListApi(Resource):
         data = marshal(datasets, dataset_detail_fields)
         for item in data:
             # convert embedding_model_provider to plugin standard format
-            if item["indexing_technique"] == "high_quality":
+            if item["indexing_technique"] == "high_quality" and item["embedding_model_provider"]:
                 item["embedding_model_provider"] = str(ModelProviderID(item["embedding_model_provider"]))
                 item_model = f"{item['embedding_model']}:{item['embedding_model_provider']}"
                 if item_model in model_names:
diff --git a/api/controllers/service_api/dataset/dataset.py b/api/controllers/service_api/dataset/dataset.py
index 49acdd693a..8ab743dc44 100644
--- a/api/controllers/service_api/dataset/dataset.py
+++ b/api/controllers/service_api/dataset/dataset.py
@@ -7,6 +7,7 @@ from controllers.service_api import api
 from controllers.service_api.dataset.error import DatasetInUseError, DatasetNameDuplicateError
 from controllers.service_api.wraps import DatasetApiResource
 from core.model_runtime.entities.model_entities import ModelType
+from core.plugin.entities.plugin import ModelProviderID
 from core.provider_manager import ProviderManager
 from fields.dataset_fields import dataset_detail_fields
 from libs.login import current_user
@@ -48,7 +49,8 @@ class DatasetListApi(DatasetApiResource):
 
         data = marshal(datasets, dataset_detail_fields)
         for item in data:
-            if item["indexing_technique"] == "high_quality":
+            if item["indexing_technique"] == "high_quality" and item["embedding_model_provider"]:
+                item["embedding_model_provider"] = str(ModelProviderID(item["embedding_model_provider"]))
                 item_model = f"{item['embedding_model']}:{item['embedding_model_provider']}"
                 if item_model in model_names:
                     item["embedding_available"] = True
diff --git a/api/core/rag/retrieval/dataset_retrieval.py b/api/core/rag/retrieval/dataset_retrieval.py
index 62d5e4b8fe..f56b2db8a6 100644
--- a/api/core/rag/retrieval/dataset_retrieval.py
+++ b/api/core/rag/retrieval/dataset_retrieval.py
@@ -870,7 +870,7 @@ class DatasetRetrieval:
                 for condition in metadata_filtering_conditions.conditions:  # type: ignore
                     metadata_name = condition.name
                     expected_value = condition.value
-                    if expected_value or condition.comparison_operator in ("empty", "not empty"):
+                    if expected_value is not None or condition.comparison_operator in ("empty", "not empty"):
                         if isinstance(expected_value, str):
                             expected_value = self._replace_metadata_filter_value(expected_value, inputs)
                         filters = self._process_metadata_filter_func(
diff --git a/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py b/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py
index e602abb66c..5643e37ce0 100644
--- a/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py
+++ b/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py
@@ -356,7 +356,7 @@ class KnowledgeRetrievalNode(LLMNode):
                     for condition in node_data.metadata_filtering_conditions.conditions:  # type: ignore
                         metadata_name = condition.name
                         expected_value = condition.value
-                        if expected_value or condition.comparison_operator in ("empty", "not empty"):
+                        if expected_value is not None or condition.comparison_operator in ("empty", "not empty"):
                             if isinstance(expected_value, str):
                                 expected_value = self.graph_runtime_state.variable_pool.convert_template(
                                     expected_value
diff --git a/web/app/components/workflow/nodes/_base/hooks/use-node-help-link.ts b/web/app/components/workflow/nodes/_base/hooks/use-node-help-link.ts
index 866c784517..0509848101 100644
--- a/web/app/components/workflow/nodes/_base/hooks/use-node-help-link.ts
+++ b/web/app/components/workflow/nodes/_base/hooks/use-node-help-link.ts
@@ -6,7 +6,7 @@ export const useNodeHelpLink = (nodeType: BlockEnum) => {
   const language = useGetLanguage()
   const prefixLink = useMemo(() => {
     if (language === 'zh_Hans')
-      return 'https://docs.dify.ai/v/zh-hans/guides/workflow/node/'
+      return 'https://docs.dify.ai/zh-hans/guides/workflow/node/'
 
     return 'https://docs.dify.ai/guides/workflow/node/'
   }, [language])
@@ -34,6 +34,7 @@ export const useNodeHelpLink = (nodeType: BlockEnum) => {
         [BlockEnum.Tool]: 'tools',
         [BlockEnum.DocExtractor]: 'doc-extractor',
         [BlockEnum.ListFilter]: 'list-operator',
+        [BlockEnum.Agent]: 'agent',
       }
     }