I have scratched my head and think but don't know what "H.E" stands for in this situation, I guess Host Environment?
H.E. stands for His Excellency. This is just a type of honorary title used to address government officials like presidents, envoys, ambassadors et cetera during official visits, presidential summits and the like. For female dignitaries, you would say Her Excellency. This is, however, not practiced in western countries. For more information about this expression, take a look at its Wikipedia page.