diff --git a/client/common/version.go b/client/common/version.go
index 4481f8bb6b..eda9365f05 100644
--- a/client/common/version.go
+++ b/client/common/version.go
@@ -18,5 +18,5 @@ package common
 
 const (
 	// SDKVersion const value for current version
-	SDKVersion = `2.5.3`
+	SDKVersion = `2.5.4`
 )
diff --git a/client/milvusclient/maintenance_options.go b/client/milvusclient/maintenance_options.go
index b0476ac342..e4a183ffdb 100644
--- a/client/milvusclient/maintenance_options.go
+++ b/client/milvusclient/maintenance_options.go
@@ -84,8 +84,8 @@ func (opt *loadCollectionOption) WithRefresh(isRefresh bool) *loadCollectionOpti
 func NewLoadCollectionOption(collectionName string) *loadCollectionOption {
 	return &loadCollectionOption{
 		collectionName: collectionName,
-		replicaNum:     1,
-		interval:       time.Millisecond * 200,
+		// replicaNum:     1, The default value of the replicaNum should be set on the server side
+		interval: time.Millisecond * 200,
 	}
 }
 
@@ -156,8 +156,8 @@ func NewLoadPartitionsOption(collectionName string, partitionsNames ...string) *
 	return &loadPartitionsOption{
 		collectionName: collectionName,
 		partitionNames: partitionsNames,
-		replicaNum:     1,
-		interval:       time.Millisecond * 200,
+		// replicaNum:     1, The default value of the replicaNum should be set on the server side
+		interval: time.Millisecond * 200,
 	}
 }
 
diff --git a/client/milvusclient/read_options.go b/client/milvusclient/read_options.go
index de11374336..f492ba4ac2 100644
--- a/client/milvusclient/read_options.go
+++ b/client/milvusclient/read_options.go
@@ -56,7 +56,7 @@ type SearchOption interface {
 var _ SearchOption = (*searchOption)(nil)
 
 type searchOption struct {
-	annRequest                 *annRequest
+	annRequest                 *AnnRequest
 	collectionName             string
 	partitionNames             []string
 	outputFields               []string
@@ -64,7 +64,7 @@ type searchOption struct {
 	useDefaultConsistencyLevel bool
 }
 
-type annRequest struct {
+type AnnRequest struct {
 	vectors []entity.Vector
 
 	annField        string
@@ -81,8 +81,8 @@ type annRequest struct {
 	templateParams  map[string]any
 }
 
-func NewAnnRequest(annField string, limit int, vectors ...entity.Vector) *annRequest {
-	return &annRequest{
+func NewAnnRequest(annField string, limit int, vectors ...entity.Vector) *AnnRequest {
+	return &AnnRequest{
 		annField:       annField,
 		vectors:        vectors,
 		topK:           limit,
@@ -91,7 +91,7 @@ func NewAnnRequest(annField string, limit int, vectors ...entity.Vector) *annReq
 	}
 }
 
-func (r *annRequest) searchRequest() (*milvuspb.SearchRequest, error) {
+func (r *AnnRequest) searchRequest() (*milvuspb.SearchRequest, error) {
 	request := &milvuspb.SearchRequest{
 		Nq:      int64(len(r.vectors)),
 		Dsl:     r.expr,
@@ -227,52 +227,52 @@ func slice2TmplValue(val any) (*schemapb.TemplateValue, error) {
 	}, nil
 }
 
-func (r *annRequest) WithANNSField(annsField string) *annRequest {
+func (r *AnnRequest) WithANNSField(annsField string) *AnnRequest {
 	r.annField = annsField
 	return r
 }
 
-func (r *annRequest) WithGroupByField(groupByField string) *annRequest {
+func (r *AnnRequest) WithGroupByField(groupByField string) *AnnRequest {
 	r.groupByField = groupByField
 	return r
 }
 
-func (r *annRequest) WithGroupSize(groupSize int) *annRequest {
+func (r *AnnRequest) WithGroupSize(groupSize int) *AnnRequest {
 	r.groupSize = groupSize
 	return r
 }
 
-func (r *annRequest) WithStrictGroupSize(strictGroupSize bool) *annRequest {
+func (r *AnnRequest) WithStrictGroupSize(strictGroupSize bool) *AnnRequest {
 	r.strictGroupSize = strictGroupSize
 	return r
 }
 
-func (r *annRequest) WithSearchParam(key, value string) *annRequest {
+func (r *AnnRequest) WithSearchParam(key, value string) *AnnRequest {
 	r.searchParam[key] = value
 	return r
 }
 
-func (r *annRequest) WithAnnParam(ap index.AnnParam) *annRequest {
+func (r *AnnRequest) WithAnnParam(ap index.AnnParam) *AnnRequest {
 	r.annParam = ap
 	return r
 }
 
-func (r *annRequest) WithFilter(expr string) *annRequest {
+func (r *AnnRequest) WithFilter(expr string) *AnnRequest {
 	r.expr = expr
 	return r
 }
 
-func (r *annRequest) WithTemplateParam(key string, val any) *annRequest {
+func (r *AnnRequest) WithTemplateParam(key string, val any) *AnnRequest {
 	r.templateParams[key] = val
 	return r
 }
 
-func (r *annRequest) WithOffset(offset int) *annRequest {
+func (r *AnnRequest) WithOffset(offset int) *AnnRequest {
 	r.offset = offset
 	return r
 }
 
-func (r *annRequest) WithIgnoreGrowing(ignoreGrowing bool) *annRequest {
+func (r *AnnRequest) WithIgnoreGrowing(ignoreGrowing bool) *AnnRequest {
 	r.ignoreGrowing = ignoreGrowing
 	return r
 }
@@ -422,7 +422,7 @@ type hybridSearchOption struct {
 	collectionName string
 	partitionNames []string
 
-	reqs []*annRequest
+	reqs []*AnnRequest
 
 	outputFields          []string
 	useDefaultConsistency bool
@@ -494,7 +494,7 @@ func (opt *hybridSearchOption) HybridRequest() (*milvuspb.HybridSearchRequest, e
 	}, nil
 }
 
-func NewHybridSearchOption(collectionName string, limit int, annRequests ...*annRequest) *hybridSearchOption {
+func NewHybridSearchOption(collectionName string, limit int, annRequests ...*AnnRequest) *hybridSearchOption {
 	return &hybridSearchOption{
 		collectionName:        collectionName,
 		reqs:                  annRequests,
diff --git a/tests/go_client/testcases/database_test.go b/tests/go_client/testcases/database_test.go
index 6d558ced8d..c6d0efb116 100644
--- a/tests/go_client/testcases/database_test.go
+++ b/tests/go_client/testcases/database_test.go
@@ -358,8 +358,15 @@ func TestDatabasePropertiesRgReplicas(t *testing.T) {
 	prepare.FlushData(ctx, t, mc, schema.CollectionName)
 	prepare.CreateIndex(ctx, t, mc, hp.TNewIndexParams(schema))
 
-	_, err = mc.LoadCollection(ctx, client.NewLoadCollectionOption(schema.CollectionName))
-	common.CheckErr(t, err, true)
+	// When load does not specify parameters, rg and replica Properties take effect
+	_, errLoad := mc.LoadCollection(ctx, client.NewLoadCollectionOption(schema.CollectionName))
+	common.CheckErr(t, errLoad, false, "resource group not found", "service resource insufficient")
+
+	// actually load with default rg, rg1 not existed
+	taskLoad, errLoad := mc.LoadCollection(ctx, client.NewLoadCollectionOption(schema.CollectionName).WithReplica(1))
+	common.CheckErr(t, errLoad, true)
+	errLoad = taskLoad.Await(ctx)
+	common.CheckErr(t, errLoad, true)
 
 	_, err = mc.Query(ctx, client.NewQueryOption(schema.CollectionName).WithLimit(10))
 	common.CheckErr(t, err, true)