The continuous effort made to fight against drug and related crimes by Guangdong police in recent years has achieved progress with the number of drug cases falling in recent years, Liu added.

But he reiterated police would not relax their vigilance in fighting against drug crimes in the months to come as the prosperous province, one of the country's economic powerhouses, has been China's main battlefield against drug crimes for decades.

Police in Maoming, a coastal city in western Guangdong province, in cooperating with police in Southwest China's Yunnan province and foreign counterparts, detained a total of 56 suspected drug traffickers after cracking down on a major cross-border drug case in July.

Meanwhile police there seized a total of 15.9 kilograms of drugs, including heroin and methamphetamine, commonly known as "ice", plus four pistols, six bullets, six vehicles and cash valued at 176,000 yuan ($25,142.86).

And a special channel that used to be active in trafficking and smuggling drugs from Southeast Asian nations to Guangdong, via Yunnan province, was believed to have been destroyed following the crackdown of the case, Liu said.