diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java
index 3bcbca3..a112747 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java
@@ -47,13 +47,13 @@ public enum WechatPayV3Type {
      *
      * @since 1.0.3.RELEASE
      */
-    TRADEBILL(HttpMethod.GET, "%s/v3/bill/tradebill"),
+    TRADE_BILL(HttpMethod.GET, "%s/v3/bill/tradebill"),
     /**
      * 申请资金账单API.
      *
      * @since 1.0.3.RELEASE
      */
-    FUNDFLOWBILL(HttpMethod.GET, "%s/v3/bill/fundflowbill"),
+    FUND_FLOW_BILL(HttpMethod.GET, "%s/v3/bill/fundflowbill"),
 
     //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/AbstractApi.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/AbstractApi.java
index 64c34c8..56c15ac 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/AbstractApi.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/AbstractApi.java
@@ -257,7 +257,7 @@ public abstract class AbstractApi {
     public ResponseEntity<Resource> downloadTradeBill(TradeBillParams tradeBillParams) {
         WechatResponseEntity<ObjectNode> wechatResponseEntity = new WechatResponseEntity<>();
 
-        this.client().withType(WechatPayV3Type.TRADEBILL, tradeBillParams)
+        this.client().withType(WechatPayV3Type.TRADE_BILL, tradeBillParams)
                 .function((wechatPayV3Type, params) -> {
                     MultiValueMap<String, String> queryParams = new LinkedMultiValueMap<>();
                     LocalDate billDate = params.getBillDate();
@@ -304,7 +304,7 @@ public abstract class AbstractApi {
      */
     public ResponseEntity<Resource> downloadFundFlowBill(FundFlowBillParams fundFlowBillParams) {
         WechatResponseEntity<ObjectNode> wechatResponseEntity = new WechatResponseEntity<>();
-        this.client().withType(WechatPayV3Type.FUNDFLOWBILL, fundFlowBillParams)
+        this.client().withType(WechatPayV3Type.FUND_FLOW_BILL, fundFlowBillParams)
                 .function((wechatPayV3Type, params) -> {
                     MultiValueMap<String, String> queryParams = new LinkedMultiValueMap<>();
                     LocalDate billDate = params.getBillDate();
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/SignatureProvider.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/SignatureProvider.java
index 87b011c..60e24c0 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/SignatureProvider.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/SignatureProvider.java
@@ -118,7 +118,7 @@ public class SignatureProvider {
     /**
      * 我方请求前用 SHA256withRSA 加签，使用API证书.
      *
-     * @param newLine      the new line
+     * @param newLine      签名协议不兼容而增加的开关 github issues#18
      * @param tenantId     the properties key
      * @param method       the method
      * @param canonicalUrl the canonical url