Drunk guy is the least credible witness ever, which is no surprise to anyone present clearly. He's obviously spouting bullshit. And even if he wasn't, I think Shen Wei would have to see Zhao Yunlan's dead body with his own eyes to believe this.

For the second poll, it's fashion. 100% impractical, just like the decorative butt chain.
Although I love the hair tie option, I think Shen Wei would have dedicated ties for his hair, and not misuse his sleeve gartners.