Muradulislam, you might want to wear a veil around your bees until you know how gentle they may be. They will center on your breath and sting around your eyes and face. I can tell you from experience they will get some crazy ideas. I have some bees that are so defensive I cannot sit near them for any length of time.
I was sitting next to my "smokeless" hive, and one of the bees from the other hive, 1 meter away, flew over and stung me on the chin! They've not been provoked in any way, I haven't opened their hive in 2 weeks, there's pollen and nectar around, it's sunny, being morning it was warm but not hot.
One sting is an occupational hazard, but you will not want them to get mad. Too many stings will send you to the hospital, even if you're not allergic.