diff --git a/server/tests/unit/domestic-payments/domestic-payment-action-schema.test.ts b/server/tests/unit/domestic-payments/domestic-payment-action-schema.test.ts
index 4cd2297ec..88e3713ca 100644
--- a/server/tests/unit/domestic-payments/domestic-payment-action-schema.test.ts
+++ b/server/tests/unit/domestic-payments/domestic-payment-action-schema.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, test } from "bun:test";
 import {
 	BillingResponseSchema,
+	ConfirmCheckoutParamsSchema,
 	DomesticPaymentProvider,
 } from "@autumn/shared";
 
@@ -66,4 +67,25 @@ describe("domestic payment action schema", () => {
 
 		expect(result.success).toBe(false);
 	});
+
+	test("accepts WeChat Native payment selection in checkout confirm params", () => {
+		const parsed = ConfirmCheckoutParamsSchema.parse({
+			payment_provider: "wechatpay",
+			payment_method_type: "wechatpay_native",
+		});
+
+		expect(parsed).toEqual({
+			payment_provider: DomesticPaymentProvider.WeChatPay,
+			payment_method_type: "wechatpay_native",
+		});
+	});
+
+	test("rejects Alipay provider with WeChat Native method", () => {
+		expect(() =>
+			ConfirmCheckoutParamsSchema.parse({
+				payment_provider: "alipay",
+				payment_method_type: "wechatpay_native",
+			}),
+		).toThrow();
+	});
 });
diff --git a/shared/internal/checkout/confirmCheckoutParams.ts b/shared/internal/checkout/confirmCheckoutParams.ts
index 7904c4835..a01d993ff 100644
--- a/shared/internal/checkout/confirmCheckoutParams.ts
+++ b/shared/internal/checkout/confirmCheckoutParams.ts
@@ -1,17 +1,36 @@
 import { FeatureOptionsSchema } from "@models/cusProductModels/cusProductModels";
+import { DomesticPaymentProvider } from "@models/domesticPaymentModels/domesticPaymentModels";
 import { z } from "zod/v4";
 import { AttachDiscountSchema } from "../../api/billing/attachV2/attachDiscount";
 
-export const ConfirmCheckoutParamsSchema = z.object({
-	feature_quantities: z
-		.array(
-			FeatureOptionsSchema.pick({
-				feature_id: true,
-				quantity: true,
-			}),
-		)
-		.optional(),
-	discounts: z.array(AttachDiscountSchema).optional(),
-});
+export const ConfirmCheckoutParamsSchema = z
+	.object({
+		feature_quantities: z
+			.array(
+				FeatureOptionsSchema.pick({
+					feature_id: true,
+					quantity: true,
+				}),
+			)
+			.optional(),
+		discounts: z.array(AttachDiscountSchema).optional(),
+		payment_provider: z
+			.enum([DomesticPaymentProvider.WeChatPay, DomesticPaymentProvider.Alipay])
+			.optional(),
+		payment_method_type: z.enum(["wechatpay_native"]).optional(),
+	})
+	.refine(
+		(value) => {
+			if (!value.payment_provider && !value.payment_method_type) return true;
+			return (
+				value.payment_provider === DomesticPaymentProvider.WeChatPay &&
+				value.payment_method_type === "wechatpay_native"
+			);
+		},
+		{
+			message:
+				"payment_provider and payment_method_type must be a supported domestic payment pair",
+		},
+	);
 
 export type ConfirmCheckoutParams = z.infer<typeof ConfirmCheckoutParamsSchema>;