should i quit that job???

Hi, I am always looking for an accountant job, however, i find a job which relates to international trade, should i quit this job and continue seeking for another new job relates to accountant?
it is really difficult to make a final decision, as it is very difficult for a chinese student to find a job in London, especially the boss agrees to apply work permit for me, but with very low salary, just meet the minimum national rate.
: ( welcome all advices