May 27, 2009, Hong Kong - Xu Xi Yuan (a.k.a. Big S) and Louis Koo have recently collaborated again in a new movie titled "Royal Tramp", where they play the roles of a married couple. In the film, Big S's character has immense admiration for Louis Koo's character, leading her to proactively seduce him in bed. Big S spares no effort in showcasing her allure, revealing her shoulders and even wrapping her legs around Louis Koo, creating a scene that is both sensual and comical.