Officials said the prisoners burned some documents and photographs, and took others with them as they fled, suggesting a sophisticated effort to remove themselves from official records.
Experts say the latest measures are a continuation of the state's increasingly sophisticated effort to control the Internet's influence on more than 300 million Chinese users.
A more sophisticated effort, though, relied on intercepting Google Maps queries made on smartphones, and using them to collect large volumes of location information.
Phones and telemarketing have eaten up at least $24 million, and Internet advertising $36 million, part of a sophisticated effort to try out different fund-raising appeals, test attacks on Mr. Romney and reach small donors.
Car preferences are among the data points that political strategists mine for the habits of potential voters – all part of the increasingly sophisticated effort by campaigns to use statistics to gain an edge.
What passes for philanthropy these days is often just a sophisticated effort to make money on engineering the kinds of rational, entrepreneurial and quantitative souls that would delight at other types of personalisation.
According to people familiar with the 2007 case, investigators also found evidence that BP traders had previously engaged in a more sophisticated effort to manipulate the much-larger crude oil market, by moving oil in and out of its gigantic storage facility in Cushing, Okla.
Ms Maita is following in Ceu's sand-coated footsteps with this cool and sophisticated effort, although even if there are the same nods towards dub, trip-hop and electronica, her first solo album is not quite as groundbreaking in its deconstructions of bossa nova and samba.
