diff --git a/app/controllers/products.controller.js b/app/controllers/products.controller.js
index 9b5805c..8dbcae2 100644
--- a/app/controllers/products.controller.js
+++ b/app/controllers/products.controller.js
@@ -10,11 +10,23 @@ const UnitMaster = db.UnitMaster;
 
 exports.createProduct = async (req, res) => {
   try {
+    const hsCode = req.body.hs_code;
 
-    const data = await Product.create(req.body);
+   if (!/^\d+$/.test(hsCode)) {
+      return res.status(400).json({error: "Invalid HS Code: Must be numeric only."});
+    }
 
+     if (String(hsCode).length > 10 && String(hsCode).length < 1 && hsCode === 0 ) {
+      return res.status(400).send({status: "failed", message: "Invalid HS Code: maximum length is 10 digits."});
+    }
+
+    if(hsCode === 0 || String(hsCode) === "0"){
+      return res.status(400).send({status: "failed", message: " must be numeric, 1–10 digits, and cannot be 0."});
+    }  
+
+    req.body.created_by = req.user.id;
+    const data = await Product.create(req.body);  
     res.status(201).send({'status':"success",'message':"created successfully",'data': data }); 
-
   } catch (error) {
     res.status(500).send({'status':"failed",'message':error.message });
   }
diff --git a/app/models/product.model.js b/app/models/product.model.js
index 4275b30..544b3fc 100644
--- a/app/models/product.model.js
+++ b/app/models/product.model.js
@@ -10,7 +10,7 @@ module.exports = (sequelize, DataTypes) => {
         allowNull: false,
       },
       hs_code: {
-        type: DataTypes.STRING,
+        type: DataTypes.INTEGER,
         allowNull: true,
       },
       hs_description: {