August 7^th－Recently, 2013 DEF CON Hacking Conference concluded annual meeting in Las Vegas. Chinese team appeared remarkably at the DEF CON Hacking Conference for the first time. The team is named ""Blue-lotus" in which most team members come from Tsinghua University. The university is regarded as one of the top universities in Mainland China by most national and international rankings.

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DEF CON is one of the world's largest annual hacker conventions, held every year in Las Vegas, Nevada. The first DEF CON took place in June 1993. The attendees at DEF CON include computer security professionals, journalists, lawyers, federal government employees, security researchers, and hackers with a general interest in software, computer architecture, phone phreaking, hardware modification, and anything else that can be "hacked".

The event consists of several tracks of speakers about computer-related and hacking-related subjects, as well as social events and contests in everything from creating the longest Wi-Fi connection and cracking computer systems to who can most effectively cool a beer in the Nevada heat.

Capture the Flag is perhaps the best known of all its contests. It is a hacking competition where teams of hackers attempt to attack and defend computers and networks using certain software and network structures. CTF has been emulated at other hacking conferences as well as in academic and military contexts.

As the first Chinese hacker team to strike a pose on the final stage of DEF CON Hacking Conference, "Blue-lotus" re-clears the definition for hacker for Chinese audience. In China, for a long time, a hacker is treated as a "criminal offender" who seeks and exploits weaknesses in a computer system or computer network. In fact, the original meaning of "hacker" referred to the high-skilled computer experts who are eager to study computer technology. More Chinese people will understand hacker's spirit via the first appearance of "Blue-lotus" in the international event.