进行了一些小优化

src/Payment/Withdrawal.php

@@ -669,7 +669,10 @@ class Withdrawal {
 		$row['amount']        = $this->database_balance_decimal((string) ($row['amount'] ?? '0'));
 		$row['fee_rate']      = (int) ($meta['fee_rate'] ?? 0);
 		$display = (string) ($meta['account'] ?? $row['account_info'] ?? '');
-		$row['display_account'] = strlen($display) > 4 ? substr($display, 0, 2) . str_repeat('*', max(2, strlen($display) - 4)) . substr($display, -2) : '****';
+		$display_length = mb_strlen($display, 'UTF-8');
+		$row['display_account'] = $display_length > 4
+			? mb_substr($display, 0, 2, 'UTF-8') . str_repeat('*', max(2, $display_length - 4)) . mb_substr($display, -2, null, 'UTF-8')
+			: '****';
 		$row['source']        = (string) ($meta['source'] ?? 'balance');
 		return $row;
 	}