Recently, the reporter learned from Dalian Customs that not long ago, Dalian and more than 10 other customs authorities closely cooperated to successfully break a smuggling case of exporting magnesia sand, which is the largest of its kind nationwide. This case has been listed as a first-level supervised case by the General Administration of Customs and a jointly supervised case by the General Administration of Customs, the Supreme People's Court and the Supreme People's Procuratorate.