The show "Running Man", in the final analysis, is to make everyone happy and relax.
Therefore, the guests in the show will engage in some small interactions for the sake of effect, such as bumping hands, joking or something.
Most of these interactions are for the sake of the show to be good-looking, don't take it too seriously.
However, you have to have a degree, and you have to be careful, don't play too much, and respect each other's feelings. If you think their interaction is a bit overdone, it's a real problem and you need to pay attention.
Fan Chengcheng and Bailu, if their interaction makes everyone feel too intimate or inappropriate, then everyone can talk about it. However, you have to think about it, they may just be playing in the show, don't take it too seriously. If they are in the rules of the show and respect each other, then let's not care too much about it and just watch the show happily.
In short, watching the show, just have fun, but don't take it too seriously. Respect everyone's feelings and enjoy the fun of the show, so everyone is happy!