What should we do if we don't know the language of the other side? The simplest solution is to make them speak our language.
It was because both Nate and Avi could speak Chinese that, under Gao Yuan's observation and testimony, the negotiation between Avi and Nate failed.
Actually, it was not so much a failure as it was impossible for these two proud men to truly complete a negotiation. However, Avi's pride was not due to personal reasons but for his country.
As for Nate's pride, well, it could only be said that he was simply a proud person and quite difficult to deal with.
Gao Yuan had not really expected Nate and Avi to send troops to help. Setting aside the issue of whether their help was needed or not, the key concern for Gao Yuan was his ability to command these two teams. With more people, the situation would become more chaotic, not only failing to enhance combat effectiveness but potentially becoming a drag.