Interesting pics. Thanks for sharing these here.
Many thanks for the suggestions.I suggest that if you have 3 very similar pictures, post only the best.
The two lesser pictures dilute the impact of the best one.
I suggest you fill the screen more with your center of interest; that extra sky and stuff doesn't add content and allows impact to drain away.
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Your English is fine and very eloquent. I suggest that perhaps the story might be well told showing more dramatically different parts of labor.
Do you live in Vietnam?
It is one of my favorite countries, although I haven't been there in Ten years.