fix

common/business/ExchangeBusiness.php

@@ -287,6 +287,13 @@ class ExchangeBusiness
         if (in_array(strtoupper($tag), ['BTY','YCC'])) {
             $exchange = ExchangeFactory::createExchange("Superx");
             $quotation = $exchange->getTicker($tag, 'USDT');
+            $quotation['rmb'] = (float)sprintf("%0.4f", $quotation['last']);
+            goto doEnd;
+        }
+
+        if (in_array(strtoupper($tag), ['USDT'])) {
+            $exchange = ExchangeFactory::createExchange("Rate");
+            $quotation = $exchange->getTicker("CNY", "USD");
             goto doEnd;
         }