It's a runner, and Phyllostachys from the sulcus. That's the easy part.

Ph. rubromarginata ?

The overall form, slight curve to the culms, size, shoots, and small number of new culms each year suggests Dulcis to me. Just a guess...

Thanks for your replies!
I did some research for the Ph. Rubromarginata and Dulcis.
My bamboo does not have red color on new shoots as Rubromarginata and does not have yellow green striping as Dulcis.
I think it looks more like Phyllostachys aurea. It is very invasive here in Georgia, but not on my property! I wish it can "infest" my backyard!
Any other ideas?

Thanks!

My dulcis doesnt have yellow green striping and it looks just like that one but smaller..

This could be PHYLLOSTACHYS Bambusoides aka Janpanese Giant Timple or Madake...

See if they have fine hair on some of the leaves like this
{{gwi:413679}}

I have one planted on Sept 05 and have about 3 new shoots this year and the shoots are like this
{{gwi:413680}}

and this is how my Madake looks like last month
{{gwi:413681}}

Do a google and see if I am right :) this is only my 2nd year growing bamboo... but thought I would throw in my two cents :) hope this helps

Yes it has hair!

{{gwi:413682}}

{{gwi:413684}}

This one is current year shoot:

{{gwi:413686}}

Thanks! I will Google it.