The bird people have taken a small glance on a shiny gold bar, probably unaware of its existence as since they didn't find nor have any strength to dig deeper in order to find valuable metals or minerals that are similar to gold. Most of their economy in the meantime were following the concept of bartering, as in trading items to items of a similar value, depending on how well or dire needed on each tribe. In the meantime, the bird people's weavers were attempting to communicate the green robed people for an offering stack of baskets (worth: 5) for a single gold bar. Since both green robed people and bird people are pretty hard to communicating one to another through speaking in their own languages, the bird people will try to make a sentence by the uses of body gestures (sign language) in some hope of understanding on what they're trying to tell.
At the magnificent city of C.M.MV near to the coast. Upon reaching to the fortified gate of a city, they saw several citizens mixture of different races walking in and out of a gate with goods, and the gate itself was protected by some numbers of local gatekeepers, shielded with a combined leather and plate armors, rifles with bayonets and some stick of grenades. The green robed people also notices that those soldiers on city defenses were locally funded by the city, and not from the emperor's infantry army that are currently waging war in all surrounding inferiors for dominance. (In which both towns/cities forces and emperor's army will most likely to have a different outfits and weaponry.)
The green robed people take the stack of baskets, nodding pleasantly. The green robed people seem slightly confused by what the bird people do, in terms of the sign language and look to eachother, talking to eachother for around a minute or so, before one of them steps up and tried to understand the sign language, while replying with sign language that says "We come in peace, we would like to know more about your selves, and your ways of doing things." is roughly what that one says to them through sign language. He also explains how gold is valuable and a rare mineral, and tells them of the various minerals and resources underground.
The green robed people located at C.M.MV take note of their observations and they ask around for an area where they can get more information about this place. That is if the C.M.MV people understand their language, unlikely but possible. They hope so, though.