diff --git a/errs/error_code.go b/errs/error_code.go
index 6a9035d..bdc05e6 100644
--- a/errs/error_code.go
+++ b/errs/error_code.go
@@ -24,3 +24,40 @@ func ThirdPartyErrorL(scope uint32, ec ErrorCode,
 
 	return e
 }
+
+func DatabaseErrorWithScope(scope uint32, ec ErrorCode, s ...string) *ers.LibError {
+	return NewError(scope, code.DBError, ec.ToUint32(), strings.Join(s, " "))
+}
+
+func DatabaseErrorWithScopeL(scope uint32,
+	ec ErrorCode,
+	l logx.Logger, filed []logx.LogField, s ...string) *ers.LibError {
+	e := DatabaseErrorWithScope(scope, ec, s...)
+	l.WithCallerSkip(1).WithFields(filed...).Error(e.Error())
+
+	return e
+}
+
+func ResourceNotFoundWithScope(scope uint32, ec ErrorCode, s ...string) *LibError {
+	return NewError(scope, code.ResourceNotFound, ec.ToUint32(), fmt.Sprintf("resource not found: %s", strings.Join(s, " ")))
+}
+
+func ResourceNotFoundWithScopeL(scope uint32, ec ErrorCode,
+	l logx.Logger, filed []logx.LogField, s ...string) *LibError {
+	e := ResourceNotFoundWithScope(scope, ec, s...)
+	l.WithCallerSkip(1).WithFields(filed...).Error(e.Error())
+
+	return e
+}
+
+func InvalidRangeWithScope(scope uint32, ec ErrorCode, s ...string) *LibError {
+	return NewError(scope, code.CatInput, ec.ToUint32(), fmt.Sprintf("invalid range: %s", strings.Join(s, " ")))
+}
+
+func InvalidFormatWithScope(scope uint32, s ...string) *LibError {
+	return NewError(scope, code.CatInput, code.InvalidFormat, fmt.Sprintf("invalid range: %s", strings.Join(s, " ")))
+}
+
+func ForbiddenWithScope(scope uint32, ec ErrorCode, s ...string) *LibError {
+	return NewError(scope, code.Forbidden, ec.ToUint32(), fmt.Sprintf("forbidden: %s", strings.Join(s, " ")))
+}