Behind-the-scenes tidbits of "Rouge": The original actor was not Leslie Cheung, and it was almost changed into a happy ghost film before the release.

Adam Cheng, the original candidate for the role of history in Rouge Kou, had to resign because she was pregnant. Leslie Cheung took over the film and began to accept the script of Rouge Kou. Shi's script is only three pages, the total number of dialogues is only a dozen, and the workload is only about 10 days. However, after Leslie Cheung took over the play, he wore a graceful dress in the fitting, and even he couldn't help himself. Screenwriter Li Bihua liked the role of Leslie Cheung very much after watching this pornographic film. He specially wrote a play for Leslie Cheung and revised the plot. Director Guan also extended the shooting time of Leslie Cheung to more than 20 days.

During filming, because Leslie Cheung's skin is too tender, it is very difficult to make up for the elderly, and it needs seven layers of powder to cover it. Usually, the old people only need two layers of wrinkle-removing water for makeup, but Leslie Cheung's face won't wrinkle after three layers. Finally, he can only reverse the mold according to Leslie Cheung's facial contour and stick it on his face to create the effect of wrinkles. In the process of makeup, Leslie Cheung can only breathe with two soda pipes inserted in his nostrils until the plaster dries. Every time she takes off her makeup, she needs to use fire wine to slowly seep into her face. Finally, Leslie Cheung's whole face turned white.

After the filming of "Rouge Kou", the producer Jiahe Film has not yet set the release date. Director Guan thinks this fact is suspicious. Later, he learned from other screenwriters that Jiahe had secretly prepared to make up the film and changed it into a happy ghost film by Taoist priests. He also prepared a huge budget of nearly 4 million Hong Kong dollars, which shows that the film was greatly revised at that time. Later, Jiahe's boss He Heguan had a showdown face to face. In desperation, Guan accepted Jiahe's decision, but he just proposed.

Actor Tan Hongqian plays Leslie Cheung's mother in the film. In an interview, she revealed that her daughter is a fan of Leslie Cheung. At that time, when Guan invited her to participate in the film, her daughter asked her to take it. When the crew was filming in Macao, Tan's daughter came to visit the class specially. After seeing Leslie Cheung, she wanted to sign and take photos, so she was very happy.

During the film promotion, Leslie Cheung was absent from the publicity activities, which led the director and the public to misunderstand Leslie Cheung and thought that Leslie Cheung was dissatisfied with Anita Mui, so he did not attend the activities. Later, Leslie Cheung explained in a radio program that he and Anita Mui had no quarrel. If time allowed, he wanted to promote the film with Anita Mui, but unfortunately, there was no arrangement. Anita Mui then publicly stated that her feelings with Leslie Cheung remained the same, and there was no discord.

Originally, Jiahe planned to make up "Rouge Kou", including turning the physiognomist into a ghost-catching Taoist priest, and cutting Anita Mui's flower quilt into five pieces. Later, when he saved Zhu Baoyi, it was an accidental union. As a result, the Taoist priest sympathized with Ruxiangkou in the process of catching ghosts, and finally allowed her to wait in the underworld for twelve hours. When the Cantonese version of Lost in Hong Kong was delayed, Guan produced the Mandarin version of Rouge Kou, which not only won six Golden Horse Awards in Taiwan Province Province. At the same time, she won the Best Actress, Best Photography and Best Art Design Awards, and rushed to the box office of more than NT$ 24 million in one breath. After hearing the news, Jiahe decided to give up the HK$ 4 million "rouge buckle" makeup plan.