2 13 years, in the 18th year of Jian 'an of Emperor Xian of Han Dynasty, Cao Cao appointed Wei Gong and Jiu Xi. Cao Cao and Sun Quan fought in ruxu, Xian Di named Cao Cao Gong Wei, and Ma Chao was defeated by yangfu and others.
2.2 13 national highway
National Highway 2 13 (or "National Highway 2 13", "G2 13" and "Lanmo Line") is a national highway in the northwest and southwest of China, starting from Xigu District of Lanzhou City and ending in Mengla County of Xishuangbanna Autonomous Prefecture, with a total length of 2,827 kilometers, passing through Gansu, Sichuan and Guizhou.
3. Natural numbers
2 13 (2 13) is a natural number between 2 12 and 2 14. It is an odd, compound rational number.
4. Network terminology
2 13 is a popular network term. Interpretation: 1 Since 13 is combined to form the letter b, 2 13 is 2b; 2. Because 13 is homophonic with "fate", 2 13 also means "second life", which means that the whole life is stupid.
5. Rap group
Half the sky is red, and the three of them have forged a deep friendship. Ten years later, they reorganized 2 13 and made a comeback. The superposition of the influence of the three people has definitely brought a blockbuster-the birth of the hard road. Once it came out, it seized the champion throne of the major rankings. The production cycle of this album is over ten years, and it is also the first album of 2 13.