My Name is KHALID MAHMUD. I am a foreign student studying in "ACADEMY OF ARMORED FORCES ENGINEERING", No 21 Dujiakan, Changxindian, Fengtai District. Postal Code 100072. I have a TEMPORARY RESIDENCE PERMIT upto August 2011. My Pasport no is A 0404927. Do I have multiple Exit and entry permit with in the time. I am going on leave to my Country (BANGLADESH) on 24 Jan 2011 and coming back on 15 February 2011. Do I have to take new Visa or renew My visa.