Guilin has the largest airport in Guangxi. Passengers from 51 countries can have a stopover in Guilin thanks to the 72-hour visa-free transit policy. It only takes 40 minutes to drive from Guilin High-tech Zone to Guilin Liangjiang International Airport, which enables passengers to arrive at almost all large and medium-sized cities in China and major cities in Southeast Asian countries within a 3-hour flight. Also, a 3-hour high-speed rail business circle has been formed, in which passengers could travel directly from Guilin to such main cities as Guangzhou, Shenzhen, Changsha, Guiyang, Nanning, Hong Kong and Macao.