SHANGHAI - Shanghai authorities have uncovered 328 intellectual property rights (IPR) violation cases in a campaign ahead of the second China International Import Expo (CIIE).

The cases were worth over 3 billion yuan ($420 million) and 285 suspects have been detained, according to the Shanghai Intellectual Property Administration.

Authorities in Shanghai launched an IPR protection campaign for the second China International Import Expo on Aug 1.

The city's public security bureau, intellectual property administration and customs authorities participated in the 100-day campaign.

Meanwhile, the Shanghai People's Procuratorate has set up a special team to handle CIIE-related IPR violation cases and the customs authorities have set up a branch to supervise the international expositions and exhibit items.

The second CIIE is scheduled for Nov 5 to 10 in Shanghai with an exhibition area of 360,000 square meters while over 3,000 enterprises from about 150 countries and regions have signed up for the event.