Kate Tsui filmed thriller film, Knock Knock Who's There

(Picture, from left to right: Kate Tsui, Carrie Ng)
Kate Tsui (徐子珊) participated in Carrie Ng's (吳家麗) first time directed in the thriller film, Knock Knock Who's There (有客到). She accepted the interview and expressed she specially learned how to make paper binding for this movie. Kate Tsui laughed and said: "Very difficult, I also bring back home to practice. My mother said "Touchwood 大吉利市", why