Shenzhen only became a city in 1979 and China's first special economic zone in 1980, yet it now counts more than 18 million residents and one of the world's largest metro networks, 17 lines and 432 stations. Because almost everyone here is a transplant, from students to Huawei and Tencent engineers, it is an easy place to make friends fast. Hong Kong sits right across the border, reachable by high-speed rail from Futian to West Kowloon in about sixteen minutes, and universities such as Shenzhen University, SUSTech and CUHK-Shenzhen all run genuinely international programmes for exchange students.
