@Johan *************
workcation for 6 weeks 5 years long is a much better reason for a 5 year visa, than doing Muay Thai training for six months and then stop the training. Of course technically that is illegal use of the visa, but it happens a lot. When you get a visa for 5 years, and only use it 6 weeks each year for workcation, it seems completely according the rules to me, but as always, embassy will decide about that.