Write SQL query to solve given problem: Among the orders placed by Ei, how many orders have quantity greater than 4?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(CASE WHEN T1.`Order Quantity` > 4 AND T2.`Customer Names` = 'Ei ' THEN 1 ELSE 0 END) FROM `Sales Orders` AS T1 INNER JOIN Customers AS T2 ON T2.CustomerID = T1._CustomerID