diff --git a/wx/Recharge.php b/wx/Recharge.php
index a1bc953..3319660 100644
--- a/wx/Recharge.php
+++ b/wx/Recharge.php
@@ -103,13 +103,18 @@ class Recharge extends Miniprogarampage
 			'trade_type' => $this->config->getTradeType(),
 		];
 
-		$data = array_merge($data, $this->data);
+		$this->data = array_merge($data, $this->data);
 
 		$key = $this->config->getKey();
 		$sign_type = $this->config->getSignType();
 
-		$data['sign'] = Help::sign($data, $key, $sign_type);
-		return Help::toXml($data);
+		$data['sign'] = Help::sign($this->data, $key, $sign_type);
+		return Help::toXml($this->data);
+	}
+
+	public function getSignData()
+	{
+		return $this->data;
 	}
 
 	/**