Forbidden City Cop

In ancient China, it was a long-established tradition for the emperor to be protected by a special squad of undercover guardsmen. Guardsmen Kung, Hei, and Choi excel in the skill of martial arts, while Fat is untrained in martial arts, working as a gynecologist as his cover. The other guardsmen and the emperor look down on him. China's neighboring country, Jin, had always wanted to invade China. By propagandizing the dissection of an extraterrestrial being, its king plans to attract all medical doctors to Jin and have them killed. Then China's soldiers would be left with no doctors to care for the wounded, and they would be no match for Jin's invading army. However, the alleged forthcoming dissection is so fascinating that even the Emperor of China goes to Jin to see it.