Is shortening the prayer permissible for one who works twenty-two consecutive days in a distant location?

Question:
He says: I work for a company, and the workplace is about a thousand kilometers away. The work schedule is twenty-two days at work and the same amount of time at home. So, do I shorten the prayer when I am at work?

Answer:
No, if you know that you will stay for more than four days, you must complete the prayer.