diff --git a/docs/ngp-performance-api.md b/docs/ngp-performance-api.md
index 94e6366..36db4fd 100644
--- a/docs/ngp-performance-api.md
+++ b/docs/ngp-performance-api.md
@@ -14,7 +14,8 @@
 
 - `startDate`、`endDate` 必填，包含首尾日期，最多 31 天。
 - `storeName` 选填；不传或传空字符串时查询全部网点。多个网点可用逗号分隔。
-- 系统状态和退款状态沿用 NGP 接口默认值。
+- 后端调用 NGP 时固定传入 `postState=800`（财务核算成功）和
+  `refundStatus=0`（无需退款），调用方不需要传这两个参数，也不能覆盖。
 - NGP 每页最多查询 200 条；服务会读取全部页面后返回合计。
 
 ## 响应
diff --git a/src/main/java/com/company/agentfoundation/integration/ngp/NgpApiClient.java b/src/main/java/com/company/agentfoundation/integration/ngp/NgpApiClient.java
index 83903c4..e25ef55 100644
--- a/src/main/java/com/company/agentfoundation/integration/ngp/NgpApiClient.java
+++ b/src/main/java/com/company/agentfoundation/integration/ngp/NgpApiClient.java
@@ -27,6 +27,8 @@ import java.util.concurrent.atomic.AtomicLong;
 @Component
 public class NgpApiClient {
   static final String SALES_POST_BILL_LIST = "ngp.bill.salepostbill.list";
+  static final int FINANCIAL_ACCOUNTING_SUCCESS = 800;
+  static final int NO_REFUND = 0;
 
   private final FoundationProperties.Ngp config;
   private final NgpTokenProvider tokenProvider;
@@ -57,13 +59,19 @@ public class NgpApiClient {
   }
 
   public JsonNode salesPostBillPage(String beginTime, String endTime, int pageIndex) {
+    return call(SALES_POST_BILL_LIST, salesPostBillRequestBody(beginTime, endTime, pageIndex));
+  }
+
+  Map<String, Object> salesPostBillRequestBody(String beginTime, String endTime, int pageIndex) {
     Map<String, Object> body = new LinkedHashMap<>();
     body.put("pageSize", Math.min(Math.max(config.getPageSize(), 1), 200));
     body.put("pageIndex", pageIndex);
     body.put("vchtypes", List.of(2000));
     body.put("beginTime", beginTime);
     body.put("endTime", endTime);
-    return call(SALES_POST_BILL_LIST, body);
+    body.put("postState", FINANCIAL_ACCOUNTING_SUCCESS);
+    body.put("refundStatus", NO_REFUND);
+    return body;
   }
 
   private JsonNode call(String method, Object requestBody) {
diff --git a/src/test/java/com/company/agentfoundation/integration/ngp/NgpApiClientTest.java b/src/test/java/com/company/agentfoundation/integration/ngp/NgpApiClientTest.java
index 4649dd1..148c0f8 100644
--- a/src/test/java/com/company/agentfoundation/integration/ngp/NgpApiClientTest.java
+++ b/src/test/java/com/company/agentfoundation/integration/ngp/NgpApiClientTest.java
@@ -1,6 +1,9 @@
 package com.company.agentfoundation.integration.ngp;
 
+import com.company.agentfoundation.config.FoundationProperties;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.jupiter.api.Test;
+import org.springframework.web.reactive.function.client.WebClient;
 
 import java.util.LinkedHashMap;
 import java.util.Map;
@@ -24,4 +27,23 @@ class NgpApiClientTest {
 
     assertThat(signature).isEqualTo("9d2447bdd434d0cdf68e3918bf69226c");
   }
+
+  @Test
+  void salesPerformanceRequestAlwaysFiltersSuccessfulAccountingAndNoRefund() {
+    FoundationProperties properties = new FoundationProperties();
+    NgpApiClient client = new NgpApiClient(
+        properties,
+        org.mockito.Mockito.mock(NgpTokenProvider.class),
+        new ObjectMapper(),
+        WebClient.builder()
+    );
+
+    Map<String, Object> body = client.salesPostBillRequestBody(
+        "2026-09-01 00:00:00", "2026-09-01 23:59:59", 3);
+
+    assertThat(body)
+        .containsEntry("postState", 800)
+        .containsEntry("refundStatus", 0)
+        .containsEntry("pageIndex", 3);
+  }
 }