diff --git a/supplychain/__pycache__/init.cpython-310.pyc b/supplychain/__pycache__/init.cpython-310.pyc
index 5dc0ef3..c09cad6 100644
Binary files a/supplychain/__pycache__/init.cpython-310.pyc and b/supplychain/__pycache__/init.cpython-310.pyc differ
diff --git a/supplychain/init.py b/supplychain/init.py
index 39939e4..a9a401e 100644
--- a/supplychain/init.py
+++ b/supplychain/init.py
@@ -312,7 +312,7 @@ async def delete_supply_contract_item(request, params_kw):
 # ============================================================
 
 async def create_sub_reseller(request, params_kw):
-    """Create a new sub-reseller."""
+    """Create a new sub-reseller with orgid for discount/accounting."""
     env = ServerEnv()
     user_id = await env.get_user()
     resellerid = await env.get_userorgid()
@@ -321,9 +321,25 @@ async def create_sub_reseller(request, params_kw):
     async with db.sqlorContext(dbname) as sor:
         sub_reseller_code = data.get("sub_reseller_code") or _generate_sub_reseller_code(resellerid)
         now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+        
+        # Create org entry for this sub_reseller
+        new_orgid = getID()
+        org_rec = {
+            "id": new_orgid,
+            "orgname": data.get("sub_reseller_name"),
+            "orgtype": "sub_reseller",
+            "status": "1",
+            "created_by": user_id,
+            "created_at": now,
+            "updated_at": now
+        }
+        async with db.sqlorContext("sage") as sor_sage:
+            await sor_sage.C("organization", org_rec)
+        
         rec = {
             "id": getID(),
             "resellerid": resellerid,
+            "orgid": new_orgid,
             "sub_reseller_code": sub_reseller_code,
             "sub_reseller_name": data.get("sub_reseller_name"),
             "contact_person": data.get("contact_person"),
@@ -553,6 +569,54 @@ async def delete_sales_ledger(request, params_kw):
         return json.dumps({"status": "ok", "message": "删除成功"})
 
 
+# ============================================================
+# Distribution Chain Query
+# ============================================================
+
+async def get_distribution_chain(product_ownerid, seller_orgid):
+    """Get the distribution chain from product owner to seller.
+
+    Chain is: product_owner → ... → sub_resellers recursively → seller
+    Returns list of orgids from product_owner down to seller (inclusive).
+    If seller_orgid == product_ownerid, returns [product_ownerid].
+    """
+    chain = [product_ownerid]
+    if seller_orgid == product_ownerid:
+        return chain
+    
+    env = ServerEnv()
+    dbname = env.get_module_dbname('supplychain')
+    db = DBPools()
+    config = getConfig()
+    db.databases = config.databases
+    
+    # Walk down the sub_reseller chain from product_owner to seller
+    async with db.sqlorContext(dbname) as sor:
+        current = product_ownerid
+        visited = {product_ownerid}
+        while current != seller_orgid:
+            sql = """SELECT orgid FROM sub_resellers 
+                     WHERE resellerid = ${resellerid}$ AND status = '1'
+                     LIMIT 100"""
+            recs = await sor.sqlExe(sql, {'resellerid': current})
+            found = False
+            for r in (recs or []):
+                orgid = r.get('orgid') if hasattr(r, 'get') else getattr(r, 'orgid', None)
+                if orgid and orgid == seller_orgid:
+                    chain.append(orgid)
+                    return chain
+                if orgid and orgid not in visited:
+                    visited.add(orgid)
+                    chain.append(orgid)
+                    current = orgid
+                    found = True
+                    break
+            if not found:
+                # Can't reach seller from current, chain ends here
+                break
+    return chain
+
+
 # ============================================================
 # Discount Calculation API (called by other modules during sales)
 # ============================================================
@@ -945,6 +1009,8 @@ def load_supplychain():
     env.delete_product_supplier_mapping = delete_product_supplier_mapping
     # Calculation API
     env.calculate_sale_amounts = calculate_sale_amounts
+    # Distribution chain query
+    env.get_distribution_chain = get_distribution_chain
     # Attachment folder helper
     env.ensure_contract_folder = ensure_contract_folder
     env.ContractAttachMgr = ContractAttachMgr