File photo: Xinhua

SHANGHAI, June 26 (Xinhua) -- Shanghai Customs authorities have investigated 34 cases of drug smuggling since the beginning of this year, in which the drugs were all delivered through mails.

According to Li Qing, deputy director of the anti-smuggling department of Shanghai Customs, among the 34 cases, 30 were sent by regular mail and four by express.

Psychotropic drugs, narcotic drugs, and marijuana products saw significant growth, while the number of cases involving traditional drugs such as heroin and cocaine fell, Li said.

From July 2019 to June 2020, Shanghai Customs seized a total of 1,930.79 grams of novel psychotropic drugs. Enditem