The preferential policies for college students to buy train tickets may be different at different times and under different conditions. But generally speaking, college students can buy student tickets in winter and summer vacations and enjoy certain discounts.

Specifically, according to the regulations of China Railway Customer Service Center, eligible college students can purchase four one-way student discount tickets between their family residence and the college location (internship place) from 10 to 1 to September 30th of the following year.

As for whether we can buy student tickets during the "Eleventh" holiday, the specific policies may vary from region to region and time. It is suggested that you consult the local railway customer service center or the relevant ticketing platform to obtain more accurate information.