A police officer from Huidong county was seriously injured after he was hit by a car being driven by a suspect during the operation in Huidong.

The officer Zhang Yanxiong who became faint when he was sent to the local hospital, has been out of danger after staying overnight in the hospital for treatment, Guo said.

Guo said the crackdown has dealt a heavy blow to drug production and related crimes in the eastern part of Guangdong province.

But he admitted fighting drug and related crimes is a long-term, touch-and-go task in Guangdong, which has registered more than 370,000 drug addicts, representing more than one-sixth of all drug addicts on the Chinese mainland.

Huidong county under the administration of Huizhou is a major ketamine source in Guangdong province and the whole country.

And the ketamine produced in Huidong usually accounts for more than 20 percent of the country's total while methamphetamine, commonly known as the ice drug, produced in Lufeng under the administration of Shanwei, also in the eastern part of the province, makes up more than 30 percent of the country's total, Guo said.

Guangdong has been the focus of China's anti-drug campaign for many years.

To bring drug and related crimes under control, more special operations will be launched in the following months, he said.