Andy Lau plays a student and takes out a snake from his schoolbag in class. What's its name?

Super Bully was released on 1993, starring Andy Lau, Jacky Cheung, Dicky Cheung, Chingmy Yau, Ekin Cheng, Yam Tat-wah, Xu Zhian, Aaron Kwok and Chen Baixiang. Both the director and the screenwriter are Jing Wong.

Introduction:

On July 1 2043, the criminal king was arrested, and a week later, the impartial judge Yu Tiexiong presided over the trial. The general sent his underworld favorite Jian back to Tiexiong 50 years ago to brainwash him so that he could not stand trial. When the government knew about it, it sent special police officers, including Tieren (Andy Lau), Broom Head (Jacky Cheung) and Developed Star (Yam Tat-wah) back to 1993 to protect Yu Tiexiong. Daxiong (Dicky Cheung) was a long-term student of No.1 Middle School in 1993. He is often teased and beaten by his classmate Yu Ji 'an (Xu Zhian), and only his girlfriend Bonny is sincere to him. Dragonfly three special police officers infiltrated the school, broom head became a teacher, and that tough classmate was Nobita. The developed star is Ren Daxiong's follower, who helped Daxiong win the taboo and took Tiexiong's whereabouts from him, but Daxiong said that there was no Tiexiong in the school. At this time, A Jian also pretended to be a teacher and sneaked into the school, shooting a poisonous needle at the iron face. After that, he moved his head sincerely and got the medicine. At this time, Nobita's mother announced that she had remarried Richard Yu, and Nobita changed her name to Tiexiong. The special police immediately protected Tiexiong, while the general wanted to kill Tiexiong and threaten her life. A Jian saw through the general's true colors, turned against him, and helped the people who became street tyrants to fight against the general. As a result, the general was killed, and the special police officers also took on another task in 1993, so they didn't have to be separated from their new girlfriends.