There are even several high-speed trains shuttling daily between Beijing and major destinations such as Shanghai, Xian, Wuhan, Guangzhou and Harbin. In addition, there are inter-city bullet trains between Beijing and Tianjin,whose running time is about half an hour. However, the busy rail transportation in the city also makes it difficult to get train tickets, especially during major holidays such as National Day and Spring Festival. Passengers are advised to buy tickets in advance during these time periods.