Django ModuleNotFoundError:没有名为“产品”的模块

I am absolute new to django and I have followed the example of Django documentation https://docs.djangoproject.com/en/3.0/intro/tutorial01/
but getting a problem in main project's urls.py file which is Module not found error pls help. Heres my main projects urls.py:

`from django.contrib import admin
from django.urls import include, path


urlpatterns = [
path('polls/', include('product.urls')),
path('admin/', admin.site.urls),
]