Please I wanna know the total cost of the trip from Malabo to qingdao city in shandong province through Ethiopian airlines, thanks

You can fly to Addis Ababa - Beijing by Ethiopian airlines and then fly to Qingdao.

The price is hard to tell, because the flights' ticket price change from time to time. If you book in advance, you will get a large discount, otherwise, it will be expensive. You may need to look at their official website for knowing the exact price during your traveling time.