A screen shows the temperature of a student entering Fresh Fish Traders' School in Tai Kok Tsui, Hong Kong, June 8, 2020. Primary Four to Form Two students in Hong Kong returned to schools after a months-long class suspension caused by the coronavirus pandemic. (CALVIN NG / CHINA DAILY)

Students wearing face masks at Fresh Fish Traders' School in Tai Kok Tsui, Hong Kong, prepare for class to start, June 8, 2020. (CALVIN NG / CHINA DAILY)