Yarebin knew Gao Yang very well, and Gao Yang knew Yarebin just as well. It's a mutual process after all.
Gao Yang acknowledged Yarebin's abilities and didn't doubt his strength, but no matter how formidable Yarebin was, some things couldn't be changed.
For instance, when a group of world leaders gathers, the security measures become extremely tight, and the veterans participating in the event wouldn't even be in the same areas as those government leaders. Yes, presidents might meet veteran representatives, but that doesn't mean Mario would have the opportunity to meet those veterans.
Yarebin said he planned to sneak in, find a chance to approach Mario and strike, but the possibility was zero.
This kind of global attention, meetings of national leaders, was not an occasion to fish in troubled waters. Someone like Yarebin would definitely know that.
So, either Yarebin had gone senile, or he was just talking nonsense, and he had another plan.
