Generally speaking, the canteens at the campus open from 8am to 8pm. If you wish to grab some snacks after 8pm, you may want to go to the Women Workers’ Corporation for some Hong Kong style dumplings and cakes, which is open until 11pm. The Women Workers’ Corporation is located near to the swimming pool at the Benjamin Franklin Centre.
Furthermore, there is a supermarket, Park n’Shop, which is open from 8:30am to 9pm located under the Benjamin Franklin Centre. It is small but you should be able to obtain basic necessities there.
Please refer to the map below:
The Guest House provides free breakfast every morning. In case you want to try something else, there are cafes and restaurants serving different styles of food and drinks in walking distance from the hostel and the forum venue. There is also a halal restaurant inside the campus, Ebeneezer's Kebabs & Pizzeria, at Li Wai Chun Building.
Please follow this link for more information on campus facilities: http://www.cuhk.edu.hk/english/campus/accommodation.html.