April 26 is a big day for students in Hong Kong. They took a special test together. About 45,000 Hong Kong students took the Diploma of Secondary Education (DSE) exams, according to South China Morning Post. The DSE for Hong Kong students is like the gaokao for students on the Chinese mainland (大陆). Before they came into the examination hall, their body temperatures (温度) had to be checked. During the exam, they had to keep social distance (社交距离).