Books with an error rate of more than one in ten thousand are unqualified books and cannot be sold on the market. But in reality, supervision is often not in place.

The following contents are from the quality inspection report of General Administration of Press and Publication 2011"3.15". I calculated that the error rate was 14/10000.

"With the assistance of the Beijing Quality Inspection Station, the Quality Inspection Center of the General Administration conducted a sampling test on some published products of publishing units involved in children's publishing products in Beijing. During the activity, a total of 858 books1kind and 63,373 books were sampled in various places, among which the Quality Inspection Center of the General Administration and Beijing Quality Inspection Station randomly sampled 58 children's books 1.388 books from 20 central publishing houses in Beijing. * * * Sampling 377 newspapers and periodicals, 5 17 1 issue (volume). Based on the test results of various places, it is judged that the batch quality of two kinds of books is unqualified; 87 were judged to be unqualified. Among the newspapers and periodicals tested, there are 6 issues (copies) with unqualified printing quality. "