My friend pass the medical exam where he has a history of PTB scarce. the medical commission extended his family/visit visa to 6 months and the result noted with "FIT". his problem right now, he will start working where the company required him to undergo medical again. can be the old result use as reference to transfer the visit visa to working visa.? is the process for visit and working visa are the same process? what is the possible problem will he encounter? thanks..