A PLA soldier shows Tan Fang, a Hong Kong University of Science and Technology student, an assault rifle during a fete at San Wai Barracks in Fanling yesterday. More than 220 students and the heads from 10 tertiary institutions joined the activities. Chinese University of Hong Kong student Jenny Siu, who wants to be a diplomat, said she was amazed by the discipline of the PLA. 'The life inside the barracks was so different from the outside world. It was just like a closed system that is so mysterious,' she said. Martin Cheng Kai-yin, from the University of Hong Kong, said he had learned that protecting the country was not easy. 'It was so heavy when I picked up a weapon. However, if given the chance, I would like to join the PLA as it is such a great mission to protect the country.'