According to Yarebin, Gao Yang didn't need to personally pick up Justin, as it was safer not to, but Gao Yang insisted on going to the airport himself, and Yarebin didn't oppose, so Gao Yang went personally.
Why did Gao Yang have to personally pick up Justin? He just wanted to take a good look at Justin the moment he saw him, to see if Justin was setting him up. But to say he wanted to look isn't quite accurate—it's more about feeling.
Engaging with Mario, the biggest concern was, of course, Mario's intelligence capabilities. Gao Yang thought Mario had surely arranged to fully monitor Rome's airport. If anyone of interest arrived, they could be detected immediately. Although with tens of thousands passing through Rome's airport daily, the likelihood of Mario completely monitoring such a large hub was very small, but he couldn't be too careful. If Mario had direct connections with the airport's security department, it was conceivable he could fully monitor the airport.
