diff --git a/README.md b/README.md
index 1f621d0..1e753c0 100644
--- a/README.md
+++ b/README.md
@@ -480,13 +480,13 @@ $response = $alipay->post('alipay.user.info.share', [], [
 ```php
 use We\Config\AlipayPaymentConfig;
 
-$pay = $client->alipayPayment(AlipayPaymentConfig::fromArray([
+$payment = $client->alipayPayment(AlipayPaymentConfig::fromArray([
     'appid' => 'app_id',
     'private_key' => file_get_contents(__DIR__ . '/merchant_private_key.pem'),
     'alipay_public_key' => file_get_contents(__DIR__ . '/alipay_public_key.pem'),
 ]));
 
-$page = $pay->post('page', [
+$page = $payment->post('page', [
     'out_trade_no' => 'P202605020001',
     'total_amount' => '0.01',
     'subject' => 'Test Order',
@@ -566,7 +566,7 @@ $order = $payment->post('v3/pay/transactions/jsapi', [
     'mchid' => 'mch_id',
     'description' => '测试订单',
     'out_trade_no' => 'T202605020001',
-    'notify_url' => 'https://example.com/wechat-pay/notify',
+    'notify_url' => 'https://example.com/wechat-payment/notify',
     'amount' => ['total' => 1, 'currency' => 'CNY'],
     'payer' => ['openid' => 'openid'],
 ]);
@@ -577,7 +577,7 @@ $order = $payment->post('v3/pay/transactions/jsapi', [
 ### 支付宝：电脑网站支付与退款
 
 ```php
-$page = $pay->post('page', [
+$page = $payment->post('page', [
     'out_trade_no' => 'P202605020001',
     'total_amount' => '0.01',
     'subject' => '测试订单',
@@ -587,7 +587,7 @@ $page = $pay->post('page', [
     'notify_url' => 'https://example.com/alipay/notify',
 ]);
 
-$refund = $pay->post('refund', [
+$refund = $payment->post('refund', [
     'out_trade_no' => 'P202605020001',
     'refund_amount' => '0.01',
     'refund_reason' => '用户退款',
@@ -597,7 +597,7 @@ $refund = $pay->post('refund', [
 支付宝异步通知验签：
 
 ```php
-if (!$pay->verifyNotify($_POST)) {
+if (!$payment->verifyNotify($_POST)) {
     throw new RuntimeException('支付宝通知验签失败');
 }
 
diff --git a/composer.json b/composer.json
index 9cc9d7c..2623dec 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
   "homepage": "https://github.com/zoujingli/WeChatDeveloper",
   "keywords": [
     "wechat",
-    "wechat-pay",
+    "wechat-payment",
     "alipay",
     "sdk",
     "php"
diff --git a/src/Platform/Wechat/PaymentClient.php b/src/Platform/Wechat/PaymentClient.php
index e1742a6..e858130 100644
--- a/src/Platform/Wechat/PaymentClient.php
+++ b/src/Platform/Wechat/PaymentClient.php
@@ -9,7 +9,7 @@ use We\Config\WechatPaymentConfig;
 use We\Exception\SignatureException;
 use We\Exception\WechatException;
 use We\Support\JsonClient;
-use We\Support\PayCrypto;
+use We\Support\PaymentCrypto;
 use We\Support\Signature;
 
 final class PaymentClient
@@ -66,7 +66,7 @@ final class PaymentClient
         /** @var array{ciphertext:string,nonce:string,associated_data?:string} $resource */
         $resource = $payload['resource'] ?? [];
 
-        return PayCrypto::decryptResource($this->config->apiV3Key, $resource);
+        return PaymentCrypto::decryptResource($this->config->apiV3Key, $resource);
     }
 
     /**
@@ -120,7 +120,7 @@ final class PaymentClient
     private function authorization(string $method, string $uri, string $timestamp, string $nonce, string $body): string
     {
         $message = strtoupper($method) . "\n{$uri}\n{$timestamp}\n{$nonce}\n{$body}\n";
-        $signature = Signature::payV3Sign($this->config->merchantPrivateKey, $message);
+        $signature = Signature::paymentV3Sign($this->config->merchantPrivateKey, $message);
         $schema = 'WECHATPAY2-SHA256-RSA2048';
         $fields = [
             'mchid' => $this->config->mchId,
@@ -147,7 +147,7 @@ final class PaymentClient
         if ($publicKey === '') {
             throw new SignatureException('微信支付平台公钥或证书不能为空');
         }
-        if (!Signature::verifyPayV3($publicKey, $message, $signature)) {
+        if (!Signature::verifyPaymentV3($publicKey, $message, $signature)) {
             throw new SignatureException('微信支付回调验签失败');
         }
     }
diff --git a/src/Support/PayCrypto.php b/src/Support/PaymentCrypto.php
similarity index 98%
rename from src/Support/PayCrypto.php
rename to src/Support/PaymentCrypto.php
index 21172c1..699d6cd 100644
--- a/src/Support/PayCrypto.php
+++ b/src/Support/PaymentCrypto.php
@@ -6,7 +6,7 @@ namespace We\Support;
 
 use We\Exception\WechatException;
 
-final class PayCrypto
+final class PaymentCrypto
 {
     /**
      * @param array{ciphertext:string,nonce:string,associated_data?:string} $resource
diff --git a/src/Support/Signature.php b/src/Support/Signature.php
index 6291f79..18f15a4 100644
--- a/src/Support/Signature.php
+++ b/src/Support/Signature.php
@@ -31,7 +31,7 @@ final class Signature
         }
     }
 
-    public static function payV3Sign(string $privateKey, string $message): string
+    public static function paymentV3Sign(string $privateKey, string $message): string
     {
         $key = openssl_pkey_get_private($privateKey);
         if ($key === false) {
@@ -44,7 +44,7 @@ final class Signature
         return base64_encode($signature);
     }
 
-    public static function verifyPayV3(string $publicKey, string $message, string $signature): bool
+    public static function verifyPaymentV3(string $publicKey, string $message, string $signature): bool
     {
         $key = openssl_pkey_get_public($publicKey);
         if ($key === false) {
diff --git a/src/Tests/PaymentClientTest.php b/src/Tests/PaymentClientTest.php
index 9b7577a..7a3971c 100644
--- a/src/Tests/PaymentClientTest.php
+++ b/src/Tests/PaymentClientTest.php
@@ -31,7 +31,7 @@ final class PaymentClientTest extends TestCase
             'Wechatpay-Timestamp' => $timestamp,
             'Wechatpay-Nonce' => $notifyNonce,
             'Wechatpay-Serial' => 'platform-serial',
-            'Wechatpay-Signature' => Signature::payV3Sign($platformPrivateKey, "{$timestamp}\n{$notifyNonce}\n{$rawBody}\n"),
+            'Wechatpay-Signature' => Signature::paymentV3Sign($platformPrivateKey, "{$timestamp}\n{$notifyNonce}\n{$rawBody}\n"),
         ];
         $client = new PaymentClient(new WechatPaymentConfig(
             'wx_app',
@@ -60,7 +60,7 @@ final class PaymentClientTest extends TestCase
             'Wechatpay-Timestamp' => $timestamp,
             'Wechatpay-Nonce' => $notifyNonce,
             'Wechatpay-Serial' => 'other-serial',
-            'Wechatpay-Signature' => Signature::payV3Sign($platformPrivateKey, "{$timestamp}\n{$notifyNonce}\n{$rawBody}\n"),
+            'Wechatpay-Signature' => Signature::paymentV3Sign($platformPrivateKey, "{$timestamp}\n{$notifyNonce}\n{$rawBody}\n"),
         ];
         $client = new PaymentClient(new WechatPaymentConfig(
             'wx_app',
diff --git a/src/Tests/PayCryptoTest.php b/src/Tests/PaymentCryptoTest.php
similarity index 81%
rename from src/Tests/PayCryptoTest.php
rename to src/Tests/PaymentCryptoTest.php
index 0ea344c..a65fba6 100644
--- a/src/Tests/PayCryptoTest.php
+++ b/src/Tests/PaymentCryptoTest.php
@@ -6,10 +6,10 @@ namespace We\Tests;
 
 use PHPUnit\Framework\Attributes\CoversClass;
 use PHPUnit\Framework\TestCase;
-use We\Support\PayCrypto;
+use We\Support\PaymentCrypto;
 
-#[CoversClass(PayCrypto::class)]
-final class PayCryptoTest extends TestCase
+#[CoversClass(PaymentCrypto::class)]
+final class PaymentCryptoTest extends TestCase
 {
     public function testDecryptResource(): void
     {
@@ -19,7 +19,7 @@ final class PayCryptoTest extends TestCase
         $plain = '{"out_trade_no":"T202605010001","trade_state":"SUCCESS"}';
         $cipher = openssl_encrypt($plain, 'aes-256-gcm', $key, OPENSSL_RAW_DATA, $nonce, $tag, $aad);
 
-        $data = PayCrypto::decryptResource($key, [
+        $data = PaymentCrypto::decryptResource($key, [
             'ciphertext' => base64_encode($cipher . $tag),
             'nonce' => $nonce,
             'associated_data' => $aad,