diff --git a/intelligence_finance_v1_ga/example_test.go b/intelligence_finance_v1_ga/example_test.go
new file mode 100644
index 0000000..5387dce
--- /dev/null
+++ b/intelligence_finance_v1_ga/example_test.go
@@ -0,0 +1,259 @@
+package intelligence_finance_v1_ga
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"testing"
+)
+
+// ExampleClient_SubmitInvoiceApply 演示提交订单开票申请。
+func ExampleClient_SubmitInvoiceApply() {
+	ctx := context.Background()
+	client := NewClient(
+		"https://api.example.com",
+		"your-tenant-id",
+		"dd-ai-table",
+		"your-client-secret",
+	)
+
+	req := &InvoiceApplyRequest{
+		OrderID:     "ORDER-20240101-001",
+		InvoiceType: 9, // 数电普票
+		Purchaser:   "某某科技有限公司",
+		TaxNum:      "91330100XXXXXXXXXX",
+		Email:       "finance@example.com",
+		Phone:       "13800000000",
+		Products: []ProductItem{
+			{
+				ProductName:      "软件服务",
+				RevenueCode:      "3040201000000000000",
+				AmountIncludeTax: 11300,
+				Quantity:         1,
+				TaxRate:          0.13,
+				TaxSign:          1,
+			},
+		},
+	}
+
+	resp, err := client.SubmitInvoiceApply(ctx, req)
+	if err != nil {
+		fmt.Println("error:", err)
+		return
+	}
+	fmt.Printf("status=%d errorMsg=%s\n", resp.Status, resp.ErrorMsg)
+	// Output:
+}
+
+// ExampleClient_CreatePayment 演示创建付款单据。
+func ExampleClient_CreatePayment() {
+	ctx := context.Background()
+	client := NewClient(
+		"https://api.example.com",
+		"your-tenant-id",
+		"dd-ai-table",
+		"your-client-secret",
+	)
+
+	req := &CreatePaymentRequest{
+		Code:   "PAY-20240101-001",
+		UserID: "04221***",
+		Title:  "供应商货款",
+		Amount: "11300.00",
+		Supplier: &Supplier{
+			Name: "某某供应商",
+		},
+		PaymentDetailList: []PaymentDetail{
+			{
+				Amount: "11300.00",
+				Tax:    "1300.00",
+			},
+		},
+	}
+
+	resp, err := client.CreatePayment(ctx, req)
+	if err != nil {
+		fmt.Println("error:", err)
+		return
+	}
+	fmt.Printf("code=%s\n", resp.Code)
+	// Output:
+}
+
+// ExampleClient_CreateSupplier 演示创建供应商。
+func ExampleClient_CreateSupplier() {
+	ctx := context.Background()
+	client := NewClient(
+		"https://api.example.com",
+		"your-tenant-id",
+		"dd-ai-table",
+		"your-client-secret",
+	)
+
+	bizData := []SupplierBizData{
+		{
+			CorpID:  "dingXXXXXX",
+			Creator: "04221***",
+			SupplierInfo: &SupplierInfo{
+				Name:            "某某供应商",
+				CorpID:          "dingXXXXXX",
+				Creator:         "04221***",
+				ContactName:     "张三",
+				ContactTelephone: "18888888888",
+				InvoiceName:     "某某供应商",
+				InvoiceTaxNo:    "91330100XXXXXXXXXX",
+			},
+		},
+	}
+	dataBytes, _ := json.Marshal(bizData)
+
+	req := &CreateSupplierRequest{
+		InvokeID: "REQ-001",
+		UserID:   "04221***",
+		Data:     string(dataBytes),
+		BizType:  BizTypeCreateSupplier,
+	}
+
+	resp, err := client.CreateSupplier(ctx, req)
+	if err != nil {
+		fmt.Println("error:", err)
+		return
+	}
+	fmt.Printf("bizType=%s data=%s\n", resp.BizType, resp.Data)
+	// Output:
+}
+
+// ExampleClient_QuerySupplierByName 演示根据名称查询供应商。
+func ExampleClient_QuerySupplierByName() {
+	ctx := context.Background()
+	client := NewClient(
+		"https://api.example.com",
+		"your-tenant-id",
+		"dd-ai-table",
+		"your-client-secret",
+	)
+
+	queries := []QueryByName{
+		{CorpID: "dingXXXXXX", Name: "某某供应商"},
+	}
+	dataBytes, _ := json.Marshal(queries)
+
+	req := &QuerySupplierByNameRequest{
+		InvokeID: "REQ-002",
+		UserID:   "04221***",
+		Data:     string(dataBytes),
+		BizType:  BizTypeQuerySupplierByName,
+	}
+
+	resp, err := client.QuerySupplierByName(ctx, req)
+	if err != nil {
+		fmt.Println("error:", err)
+		return
+	}
+	fmt.Printf("success=%v result=%s\n", resp.Success, resp.Result)
+	// Output:
+}
+
+// ExampleClient_UpdateSupplier 演示更新供应商。
+func ExampleClient_UpdateSupplier() {
+	ctx := context.Background()
+	client := NewClient(
+		"https://api.example.com",
+		"your-tenant-id",
+		"dd-ai-table",
+		"your-client-secret",
+	)
+
+	bizData := UpdateSupplierBizData{
+		SupplierID:     "SUP_XXXXX",
+		Name:           "某某供应商",
+		CorpID:         "dingXXXXXX",
+		UserID:         "04221***",
+		ContactName:    "李四",
+		ContactTelephone: "18888888888",
+		AccountType:    AccountTypeCorpBankCard,
+	}
+	dataBytes, _ := json.Marshal(bizData)
+
+	req := &UpdateSupplierRequest{
+		InvokeID: "REQ-003",
+		UserID:   "04221***",
+		Data:     string(dataBytes),
+		BizType:  BizTypeUpdateSupplier,
+	}
+
+	resp, err := client.UpdateSupplier(ctx, req)
+	if err != nil {
+		fmt.Println("error:", err)
+		return
+	}
+	fmt.Printf("bizType=%s\n", resp.BizType)
+	// Output:
+}
+
+// ExampleClient_QuerySupplierByUserDefineCode 演示根据用户自定义编码查询供应商。
+func ExampleClient_QuerySupplierByUserDefineCode() {
+	ctx := context.Background()
+	client := NewClient(
+		"https://api.example.com",
+		"your-tenant-id",
+		"dd-ai-table",
+		"your-client-secret",
+	)
+
+	bizData := QueryByUserDefineCode{
+		CorpID:         "dingXXXXXX",
+		UserDefineCode: "SUP-CODE-001",
+	}
+	dataBytes, _ := json.Marshal(bizData)
+
+	req := &QuerySupplierByUserDefineCodeRequest{
+		InvokeID: "REQ-004",
+		UserID:   "04221***",
+		Data:     string(dataBytes),
+		BizType:  BizTypeQuerySupplierByUserDefine,
+	}
+
+	resp, err := client.QuerySupplierByUserDefineCode(ctx, req)
+	if err != nil {
+		fmt.Println("error:", err)
+		return
+	}
+	fmt.Printf("bizType=%s data=%s\n", resp.BizType, resp.Data)
+	// Output:
+}
+
+// TestVerifyNotificationSignature 演示通知验签。
+func TestVerifyNotificationSignature(t *testing.T) {
+	verifyKey := "customer-verify-secret"
+	rawBody := []byte(`{"bizType":"payment","bizId":"PAY-001","data":"{}"}`)
+	sign := HmacSHA256Base64(verifyKey, string(rawBody))
+
+	ok, err := VerifyNotificationSignature(verifyKey, rawBody, sign)
+	if err != nil {
+		t.Fatalf("verify error: %v", err)
+	}
+	if !ok {
+		t.Fatal("signature mismatch")
+	}
+}
+
+// TestParsePaymentNotify 演示解析支付完成通知。
+func TestParsePaymentNotify(t *testing.T) {
+	body := []byte(`{
+		"code":"PAY-001",
+		"instanceId":"inst-001",
+		"corpId":"dingXXXXXX",
+		"paymentStatus":"SUCCESS",
+		"paymentTime":"2024-01-01 10:00:00",
+		"userId":"04221***",
+		"amount":"11300.00"
+	}`)
+	n, err := ParsePaymentNotify(body)
+	if err != nil {
+		t.Fatalf("parse error: %v", err)
+	}
+	if n.PaymentStatus != PaymentStatusSuccess {
+		t.Fatalf("unexpected status: %s", n.PaymentStatus)
+	}
+}
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