To put it simply, the Red Cross Ape was elated.
When it had been summoned from Liu Qian Town, it thought that it had to do another exhibition of itself being an obedient huge ape for other people to take pictures of. After all, the day had not passed yet, and considering how strong his master was, there was no need for it to really do much against those humans that he was showing off to.
But things changed when the command that Jin had given to it was vastly different from the first. The Red Cross Ape emerged into the portal with delight throwing its master into the skies, allowing it to kill one of the wyrms that had been pestering him from the start.