BEIJING, June 27 (Xinhua) -- Chinese railway police seized about 203 kg of narcotics in 2018, the National Narcotics Control Commission said.

Railway police have improved their network against drug trafficking in the past few years and achieved major progress, said a statement from the railway police on Wednesday.

They have stepped up surveillance over stations and trains with high incidence of drug trafficking and trained officers in the field to more efficiently spot suspicious passengers and activities, the statement said.

In May, railway police exposed a drug trafficking ring that employed "drug mules" -- individuals who hide drugs inside their body to avoid being caught -- to ferry drugs from Myanmar to the southwestern Chinese city of Chengdu. Ten suspects were detained and 3.73 kg of drugs seized.

On the International Day Against Drug Abuse and Illicit Trafficking that fell on Wednesday, railway police across the country also launched various awareness programs on the train, the statement said.