diff --git a/lib/alipay/service.rb b/lib/alipay/service.rb
index e16b374..364e51a 100644
--- a/lib/alipay/service.rb
+++ b/lib/alipay/service.rb
@@ -271,7 +271,7 @@ def self.update_merchant_qr_code(params, options = {})
     end
 
     ACQUIRER_OVERSEAS_QUERY_REQUIRED_PARAMS = %w(partner_trans_id)
-    def self.acquire_overseas_query(params, options = {})
+    def self.acquirer_overseas_query(params, options = {})
       params = Utils.stringify_keys(params)
       check_required_params(params, ACQUIRER_OVERSEAS_QUERY_REQUIRED_PARAMS)
 
@@ -279,7 +279,7 @@ def self.acquire_overseas_query(params, options = {})
         'service'        => 'alipay.acquire.overseas.query',
         '_input_charset' => 'utf-8',
         'partner'        => options[:pid] || Alipay.pid,
-      }
+      }.merge(params)
 
       request_uri(params, options).to_s
     end