這種潛規則何止日本有?

http://www.msn.com/zh-hk/news/world/%E5%A6%B9%E5%A6%B9%E6%8B%8Dav%E3%80%81%E5%A5%B3%E5%8F%8B%E9%99%AA%E7%9D%A1%EF%BC%8C%E4%BB%96%E4%B9%9F%E5%8F%AA%E8%83%BD%E9%9B%99%E6%89%8B%E5%A5%89%E4%B8%8A%E4%BF%9D%E9%9A%AA%E5%A5%97%E2%80%A6%E4%B8%80%E9%83%A8%E9%9B%BB%E5%BD%B1%E6%8F%AD%E9%9C%B2%E6%97%A5%E6%9C%AC%E9%80%90%E5%A4%A2%E6%BD%9B%E8%A6%8F%E5%89%87/ar-BBuASUL?li=AAazejl&ocid=spartandhp