diff --git a/src/Payment/Revenue.php b/src/Payment/Revenue.php
index 8a8a3ab7..f575e10e 100644
--- a/src/Payment/Revenue.php
+++ b/src/Payment/Revenue.php
@@ -283,8 +283,9 @@ class Revenue {
             $where[] = 'status = %s';
             $params[] = $status;
         }
-        $currency = sanitize_key((string) ($args['currency'] ?? ''));
-        if (in_array($currency, ['CNY', 'points'], true)) {
+        $currency = strtolower(sanitize_key((string) ($args['currency'] ?? '')));
+        if (in_array($currency, ['cny', 'points'], true)) {
+            $currency = $currency === 'points' ? 'points' : 'CNY';
             $where[] = 'currency = %s';
             $params[] = $currency;
         }
@@ -317,8 +318,9 @@ class Revenue {
 
         $where = 'author_id = %d';
         $params = [$user_id];
-        $currency = sanitize_key((string) ($args['currency'] ?? ''));
-        if (in_array($currency, ['CNY', 'points'], true)) {
+        $currency = strtolower(sanitize_key((string) ($args['currency'] ?? '')));
+        if (in_array($currency, ['cny', 'points'], true)) {
+            $currency = $currency === 'points' ? 'points' : 'CNY';
             $where .= ' AND currency = %s';
             $params[] = $currency;
         }
@@ -388,8 +390,9 @@ class Revenue {
             $where[] = 'post_id = %d';
             $params[] = $post_id;
         }
-        $currency = sanitize_key((string) ($args['currency'] ?? ''));
-        if (in_array($currency, ['CNY', 'points'], true)) {
+        $currency = strtolower(sanitize_key((string) ($args['currency'] ?? '')));
+        if (in_array($currency, ['cny', 'points'], true)) {
+            $currency = $currency === 'points' ? 'points' : 'CNY';
             $where[] = 'currency = %s';
             $params[] = $currency;
         }