If you're referring to the poster at 1:10, then yes, it's also in Chinese.
传统烈火国美味食品 - Roughly translated, traditional Strong Fire Nation delicacies (food)
The strong isn't quite necessary but apparently the Fire Nation likes to use that adjective to refer to itself.
The other posters are also written in Chinese but it's a bit hard to see the actual characters -- or at least, I'm not good enough to recognize more than a couple from the blurred outlines.
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传统烈火国美味食品 - Roughly translated, traditional Strong Fire Nation delicacies (food)
The strong isn't quite necessary but apparently the Fire Nation likes to use that adjective to refer to itself.
The other posters are also written in Chinese but it's a bit hard to see the actual characters -- or at least, I'm not good enough to recognize more than a couple from the blurred outlines.