This is offensive. The entry for Eritrea labels it Ethiopia, the country that has attempted to occupy it for centuries.
I have had many Taiwanese friends young and old and most of them prefer themselves and their culture to be referred to as Chinese.
I have also had some young (mainland) Chinese friends and they, too, are still very aware of the situation. Even though some of them have Taiwanese friends themselves, they still look with disdain on Taiwan/RoC as a political entity.