Please tell me a movie. It’s an old movie. A Chinese scientist invented an invisibility drug. He applied for a patent but was told that the drug could not be applied for. Then he said he used a laser.

"The Invisible Doctor" is a science fiction crime film directed by Zhang Zien and starring Chang Lantian, Gao Ming and others. The film tells the story of a doctor who spent several years developing an invisible drug, which caused a series of unexpected troubles. The most serious thing is that after criminals steal the medicine, they use it to steal money from banks and gold objects from museums, which adds unnecessary trouble to society and the public security department. After a series of desperate struggles, the doctor finally destroyed the invisibility medicine.

Time of production

1991