When we deploy our new blog using Typecho, a default Typecho page is created.
The page is added by default when you install Typecho the first time.
In install.php we can find:

// write category
                    'name' => _t('Default category'),
                    'slug' => 'default',
                    'type' => 'category',
                    'description' => _t('This is a default category'),
                    'count' => 1

If we want to delete this page, we can go to the database and delete the query _typecho.metas_.