"On the bus is Lin Daiyu, get off is Fang Shiyu" refers to some of the elderly in the car like Lin Daiyu general, weak, in desperate need of a seat. But when you get off the bus, you'll be able to walk as fast as you can. If the street where there are free items, the spirit than who is good.
Jumping up to square dance, not to mention, the body at this time, really do not see like the elderly, completely a "Fang Shiyu" faction. It is a kind of ironic description of the current elderly riding the bus, directly pointing out that many "rely on the old to sell the old" people look.