Bib info:
Xteam(中国)软件技术有限公司. Qt程序设计[M]. 北京 : 清华大学出版社, 2002.1— 320.
pdf： upload/qt.programming.chs.xteam.2002.pdf
creation info: download from apabi library, then convert to pdf with a resolution of 300 dpi
The conversion is very slow; It consumes around three hours on a 2.0GHz/1G computer
about 48m in size
