Old Man Mu and Dog Butcher had completely different views on what the rules of Jianghu were.
"You take a step back, and I'll take a step back. That way, everybody gets something. This is what the rules of Jianghu are."
"Heh heh, bullshit! What if I take a step forward after you take one backward? How can you be so sure that I will remain still after taking a step backward?"
"It doesn't matter. Rules are not something formed between merely two people, but rather something that is upheld by all of Jianghu. If you break the rules, then you will lose your place in Jianghu, and everybody will despise and attack you."
"Hehe, you think that I haven't been mobbed before? But look at me, I'm still standing here alive. And look at you. You've been following the rules for so many years, but you still live under your sister's custody like her dog. Oh, and where's your dog-butchering saber? Why aren't you carrying it around anymore?"