diff --git a/product_management/core.py b/product_management/core.py
index ffb3f7a..804192e 100644
--- a/product_management/core.py
+++ b/product_management/core.py
@@ -1390,6 +1390,32 @@ WHERE resource_ref_id = ${llm_id}$ AND product_type = 'llm_model' LIMIT 1"""
             raise Exception(f'calculate_product_cost failed: {cost_result}')
         raw_cost = cost_result.get('amount', 0)
 
+        # 4b. Get product currency
+        prod_currency = 'CNY'
+        try:
+            dbname = self._get_dbname()
+            async with DBPools().sqlorContext(dbname) as sor:
+                prod_rows = await sor.sqlExe(
+                    "SELECT currency FROM product WHERE id=${pid}$", {'pid': product_id})
+                if prod_rows:
+                    prod_currency = prod_rows[0].currency or 'CNY'
+        except Exception:
+            pass
+
+        # 4c. Get user billing currency and exchange rates
+        user_currency = 'CNY'
+        cost_in_user = raw_cost
+        cost_base = raw_cost
+        try:
+            env = ServerEnv()
+            user_currency = await env.get_user_currency(userorgid)
+            if prod_currency != user_currency:
+                rate = await env.get_exchange_rate(prod_currency, user_currency, 'sell_rate')
+                cost_in_user = round(raw_cost * rate, 2)
+            cost_base = await env.convert_to_base(cost_in_user, user_currency, 'sell_rate')
+        except Exception:
+            pass
+
         # 5. Determine seller (who sold to customer)
         dbname = self._get_dbname()
         seller_orgid = userorgid  # default: customer bought directly from owner
@@ -1409,7 +1435,7 @@ WHERE resource_ref_id = ${llm_id}$ AND product_type = 'llm_model' LIMIT 1"""
         # 7. Get customer discount (seller gives to customer)
         cust_discount = await env.get_min_product_discount(
             product_id, seller_orgid, userorgid)
-        customer_amount = raw_cost * cust_discount
+        customer_amount = cost_in_user * cust_discount
 
         # 8. Build accounting items for each link in chain
         # Chain: product_owner → ... → seller
@@ -1435,30 +1461,31 @@ WHERE resource_ref_id = ${llm_id}$ AND product_type = 'llm_model' LIMIT 1"""
                 action='PAY', customerid=userorgid, resellerid=ownerid,
                 providerid=providerid, biz_date=biz_date, timestamp=timestamp,
                 productid=product_id, transamt=customer_amount,
-                variable={"交易金额": customer_amount, "交易手续费": 0}))
+                currency=user_currency, base_amount=round(customer_amount, 2),
+                variable={"交易金额": customer_amount, "交易币种": user_currency, "交易手续费": 0}))
             # PAY*: owner → supplier, amount = raw_cost * supplier_discount
             supplier_amount = raw_cost * last_link_discount
             accounting_items.append(DictObject(
                 action='PAY*', customerid=ownerid, resellerid=providerid,
                 providerid=providerid, biz_date=biz_date, timestamp=timestamp,
                 productid=product_id, transamt=supplier_amount,
-                variable={"采购成本": supplier_amount}))
+                currency=prod_currency, base_amount=cost_base,
+                variable={"采购成本": supplier_amount, "采购币种": prod_currency}))
         else:
             # Multi-level distribution chain
             for i, orgid in enumerate(chain):
                 is_last = (i == len(chain) - 1)
                 if is_last:
                     # Last link (closest to customer): PAY
-                    # Get this distributor's discount towards their downstream
                     accounting_items.append(DictObject(
                         action='PAY', customerid=userorgid, resellerid=orgid,
                         providerid=providerid, biz_date=biz_date, timestamp=timestamp,
                         productid=product_id, transamt=customer_amount,
-                        variable={"交易金额": customer_amount, "交易手续费": 0}))
+                        currency=user_currency, base_amount=round(customer_amount, 2),
+                        variable={"交易金额": customer_amount, "交易币种": user_currency, "交易手续费": 0}))
                 else:
                     # Middle link: PAY*
                     next_orgid = chain[i + 1]
-                    # Get discount from this level to next level
                     up_discount = 1.0
                     try:
                         up_discount = await env.get_min_distributor_discount(
@@ -1470,14 +1497,16 @@ WHERE resource_ref_id = ${llm_id}$ AND product_type = 'llm_model' LIMIT 1"""
                         action='PAY*', customerid=orgid, resellerid=next_orgid,
                         providerid=providerid, biz_date=biz_date, timestamp=timestamp,
                         productid=product_id, transamt=link_amount,
-                        variable={"分销结算": link_amount}))
+                        currency=prod_currency, base_amount=round(link_amount, 2),
+                        variable={"分销结算": link_amount, "结算币种": prod_currency}))
             # Final PAY*: top of chain → supplier
             supplier_amount = raw_cost * last_link_discount
             accounting_items.append(DictObject(
                 action='PAY*', customerid=chain[0], resellerid=providerid,
                 providerid=providerid, biz_date=biz_date, timestamp=timestamp,
                 productid=product_id, transamt=supplier_amount,
-                variable={"采购成本": supplier_amount}))
+                currency=prod_currency, base_amount=cost_base,
+                variable={"采购成本": supplier_amount, "采购币种": prod_currency}))
 
         # 9. Write biz_order and call consume_accounting
         dbname = self._get_dbname()
@@ -1493,6 +1522,7 @@ WHERE resource_ref_id = ${llm_id}$ AND product_type = 'llm_model' LIMIT 1"""
                 "order_status": "1",
                 "business_op": "PAY",
                 "amount": customer_amount,
+                "currency": user_currency,
                 "userid": userid,
                 "productid": product_id
             }
@@ -1502,7 +1532,8 @@ WHERE resource_ref_id = ${llm_id}$ AND product_type = 'llm_model' LIMIT 1"""
                 "orderid": orderid,
                 "productid": product_id,
                 "product_cnt": 1,
-                "trans_amount": customer_amount
+                "trans_amount": customer_amount,
+                "currency": user_currency,
             }
             await sor.C('biz_orderdetail', orderdetail)
             await consume_accounting(sor, orderid, accounting_items)