进行了一些小优化

tests/asset-ledger/WithdrawalTest.php

@@ -0,0 +1,18 @@
+<?php
+
+use AKSRT\Payment\Withdrawal;
+use PHPUnit\Framework\TestCase;
+
+final class WithdrawalTest extends TestCase {
+	public function test_account_display_mask_preserves_utf8_characters(): void {
+		$method = new ReflectionMethod(Withdrawal::class, 'normalize_row');
+		$row = $method->invoke(Withdrawal::get_instance(), [
+			'account_info' => wp_json_encode(['account' => '账户名称 账户号码']),
+			'gross_amount' => '100.00',
+			'amount' => '95.00',
+		]);
+
+		self::assertSame('账户*****号码', $row['display_account']);
+		self::assertSame(1, preg_match('//u', $row['display_account']));
+	}
+}