QPI international arm has already announced it is looking the possibility of developing two refineries in Panama and Tunisia.
...
QPI is also planning to set up an oil refinery in Tunisia following a feasibility study.

Via [Gulf Times]

The big boom of Oil in Tunisia is just attracting more and more people from the west, Chinese companies didn't really get a fair access to the Tunisian block monopolized by Americans, British and Italians thus they are trying to get there through the Middle east a strong investor with infinite business capabilities in the area.