Founded in 1999, CSDN is the largest community website and services platform in China. We are the lifetime partner of software developers and IT Pros in China, serving them with Knowledge, Career and Development services to meet their fundamental needs of Learning, Networking, and Programming during their growth lifecycle. CSDN has more than 24 million registered users (8 million active monthly users) and 500,000 enterprises as partnership members. CSDN ranks No.39 (No.27 at peak) among all China websites(Alexa). CSDN owns several leading brands:

• The No.1 Chinese IT technology online community in the world: www.csdn.net;
• The most influential and authoritative IT professional journal in China: Programmer magazine;
• China mobile developers community: www.cmdn.net;
• Leading senior software developers community: www.iteye.com;
• Leading Chinese IT technology learning platform: LeZhi Education;
• The largest community of IT senior managers: CTO Club;
• The technology organization for national university students: CSDN University Club;
• The largest Chinese software crowdsourcing platform: www.CSTO.com；
• Community for start-ups: CSDN Start-up Club；
• IT career website: www.PONGO.cn;