There is a movie about an infestation of rats. What is it?

"Rat Man-Eating City"

Plot introduction

In order to conduct research on hormones, school professors used a large number of animals for experiments, causing some students to dissatisfaction. When animal-loving students held up signs to protest in vain, they broke into the professor's laboratory with the intention of destroying the experimental equipment. Unexpectedly, they were attacked by a group of rats that had accidentally eaten experimental hormones and suddenly grew in size. After that, the whole city was shrouded in an atmosphere of panic. The war between humans and mice was not ended until the cause was found out and the rats were completely eliminated.

The plot takes place on a university campus. A professor was doing an experiment to increase growth hormone in tomatoes. Unfortunately, he was eaten by a mouse kept aside. As a result, the mouse began to grow huge, and happened to be experimented on at night. Some college students who were causing trouble in the room accidentally opened the cage. Death incidents began to occur on campus. In the end, the protagonist used his own guinea pig to lure all the mice together, and then the police eliminated all the mice.

Classic shot: During the opening ceremony of the university, a group of students performed water ballet in the swimming pool, and a huge rat tail suddenly swept out of the water...