Update product.md

@@ -1708,7 +1708,9 @@ code为200即为成功，否则是失败。
       }
       }
     ],
     ],
     "vip_price": "¥0.00",
     "vip_price": "¥0.00",
-    "yohoCoinNum": "0"
+    "yohoCoinNum": "0",
+    "isInstalment" : "1"  // 1代表支持分期 0 代表不支持分期
+    "instalmentId" : "1111"   //分期支付活动ID
   },
   },
   "md5": "8ad88a361e69a509c547b847d3da3f11",
   "md5": "8ad88a361e69a509c547b847d3da3f11",
   "message": "product info"
   "message": "product info"