Photocatalyst anti-virus coating applied at school

https://www.stgss.edu.hk/wp-content/themes/osmosis/images/empty/thumbnail.jpg 150 150 STGSS STGSS https://www.stgss.edu.hk/wp-content/themes/osmosis/images/empty/thumbnail.jpg 10th February 2021 18th November 2021

Our school has conducted a thorough sterilization photocatalyst anti-virus coating on 9 & 10 February.