diff --git a/common/HttpClient.php b/common/HttpClient.php
index b45c3a2..e90c1da 100644
--- a/common/HttpClient.php
+++ b/common/HttpClient.php
@@ -579,7 +579,29 @@ class HttpClient
 			$result['message'] = '';
 		} else {
 			$result['code'] = $body[$this->errorCodeField] ?? 0;
-			$result['message'] = $body[$this->errorMsgField] ?? 'system success.';
+
+			if (strpos($this->errorMsgField, '.') !== false) {
+				$parent = [];
+				$explode = explode('.', $this->errorMsgField);
+				foreach ($explode as $item) {
+					if (empty($item)) {
+						continue;
+					}
+					if (empty($parent)) {
+						$parent = $body[$item];
+						continue;
+					}
+					if (is_string($parent)) {
+						break;
+					}
+					if (!isset($parent[$item])) {
+						break;
+					}
+				}
+				$result['message'] = $parent ?? 'system success.';
+			} else {
+				$result['message'] = $body[$this->errorMsgField] ?? 'system success.';
+			}
 		}
 		$result['data'] = $body;
 		$result['header'] = $header;