Drug War is a Hong Kong-Chinese action crime thriller movie directed and produced by Johnnie To. The movie stars Sun Honglei as Zhang, a police commander who leads an undercover drug enforcement team in China. After Timmy Choi, a drug lord, is caught by the police, Zhang makes a deal with him and convinces him to work with the police as an informant.
Choi, played by Louis Koo, agrees to help the police infiltrate a major drug network. He helps the police with details about the drug network, including its leaders, suppliers, and distributors. With Choi's help, Zhang and his team plan a raid on the drug network's factory in the countryside. The raid is successful, and the police arrest many drug dealers and seize a large quantity of drugs.
However, the police find out that there is a large shipment of drugs coming into the country from Hong Kong, and they need Choi's help to stop it. They set up a sting operation and go after the drug smugglers in a high-speed chase. In the end, there is a dramatic confrontation between the police and the drug smugglers, and Choi's loyalty is tested.
The movie is a tense, gripping thriller that delves into the world of drug trafficking and the complexities of law enforcement. It is known for its realistic portrayal of police work and its intense action scenes. The movie has been praised for its direction, performances, and screenplay and is considered one of the best crime movies from China.