His office has already reached legal agreements with US police to combat cross-border infringements more effectively.
"Without information from the US police and other foreign organizations, such as the Motion Picture Association, we wouldn't have been able to solve some cases as quickly as we did," Zhang said.
Such cooperation is a necessity, he said, as some Chinese transfer illegal products or set up illegal servers overseas to avoid Chinese laws, posing a challenge for investigators.
"In these cases, we have to ask for help from the country where the illegal servers are, hoping their legal departments can help us do some work or get the evidence we need," he said.
Solar yacht put into use in SE China