Being alone and fishing was dull, but it's fun when it's two.
Air Force bloke, you really live up to your name, even when crossing the Nai River Bridge, you can't help but peek into the water to see if there are fish.
The river is also a Path. For the elder brother's steadfast heart towards the Way, Lu Bei can't help but respect, and since he's free, he accepts the invitation to go fishing together.
Lu Bei brings the people, Lin Yu brings the fishing gear, and the river provides fish, and so the plan is decided.
Bei Jun Mountain has a complex underground water system that forms rivers and countless streams, not to mention a large lake. It's geographically advantaged, a natural training base for the Air Force.
All along the way, Lin Yu point to various rivers, proudly telling Lu Bei that all the fish in them were raised by him.
And what's there to be proud of?