diff --git a/api/__pycache__/settings.cpython-313.pyc b/api/__pycache__/settings.cpython-313.pyc
index 58280aa7..19c59008 100644
Binary files a/api/__pycache__/settings.cpython-313.pyc and b/api/__pycache__/settings.cpython-313.pyc differ
diff --git a/app/__pycache__/models.cpython-313.pyc b/app/__pycache__/models.cpython-313.pyc
index 567449db..73ee1fba 100644
Binary files a/app/__pycache__/models.cpython-313.pyc and b/app/__pycache__/models.cpython-313.pyc differ
diff --git a/app/migrations/0340_file_hashtag_co_ownership.py b/app/migrations/0340_file_hashtag_co_ownership.py
new file mode 100644
index 00000000..7b6fe03f
--- /dev/null
+++ b/app/migrations/0340_file_hashtag_co_ownership.py
@@ -0,0 +1,34 @@
+# Generated by Django 5.1.7 on 2025-12-31 02:41
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app', '0339_cart_index_sale_policy_index'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='file',
+            name='hashtag',
+            field=models.CharField(max_length=200, null=True),
+        ),
+        migrations.CreateModel(
+            name='Co_Ownership',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('code', models.CharField(max_length=30, unique=True)),
+                ('create_time', models.DateTimeField(auto_now_add=True, null=True)),
+                ('update_time', models.DateTimeField(auto_now=True, null=True)),
+                ('people', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='+', to='app.people')),
+                ('transaction', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='+', to='app.transaction')),
+            ],
+            options={
+                'db_table': 'co_ownership',
+                'unique_together': {('transaction', 'people')},
+            },
+        ),
+    ]
diff --git a/app/models.py b/app/models.py
index c00587b5..6831d794 100644
--- a/app/models.py
+++ b/app/models.py
@@ -168,7 +168,6 @@ class Product_Status(models.Model):
     class Meta:
         db_table = 'product_status'
 
-
 class Customer_Type(models.Model):
     code = models.CharField(max_length=30, null=False, unique=True)
     name = models.CharField(max_length=100, null=False)
@@ -666,6 +665,7 @@ class File(AutoCodeModel):
     doc_type = models.ForeignKey(Document_Type, null=True, related_name='+', on_delete=models.PROTECT)
     name = models.CharField(max_length=200, null=False)
     file = models.CharField(max_length=200, null=False)
+    hashtag= models.CharField(max_length=200, null=True)
     size = models.IntegerField(null=False)
     caption = models.CharField(max_length=200, null=True)
     create_time = models.DateTimeField(null=True, auto_now_add=True)
@@ -1958,6 +1958,18 @@ class Transaction_Discount(models.Model):
         db_table = 'transaction_discount'
         unique_together = ('transaction', 'discount')
         
+
+class Co_Ownership(models.Model):
+    code = models.CharField(max_length=30, null=False, unique=True)
+    transaction = models.ForeignKey(Transaction, null=False, related_name='+', on_delete=models.PROTECT)
+    people = models.ForeignKey(People, null=False, related_name='+', on_delete=models.PROTECT)
+    create_time = models.DateTimeField(null=True, auto_now_add=True)
+    update_time = models.DateTimeField(null=True, auto_now=True)
+
+    class Meta:
+        db_table = 'co_ownership'
+        unique_together = ('transaction', 'people')
+        
 class Workflow(models.Model):
     """
     Bảng Workflow: Quản lý các luồng chính (multi-flow cho dự án).