On January 5, in an outgoing mail declared as edible laver to the USA, the Post Office stationed by Shenzhen Customs, with the help of a drug-sniffing dog, intercepted 25 bags of suspicious white granular crystals disguised as food desiccant. On January 7, identified by criminal technique, 10 bags therein were filled with ketamine, totaling 959 grams. At present, the case has been investigated by anti-smuggling officers.