In 2020, we have provided photocatalyst spraying services for properties under well-known property management -Hongkong Land. After a period of construction, the client did the relevant bacteria test on his own, which proved that the bacterial content has been kept at an ultra-low level afterwards. Customers are quite satisfied with our excellent and professional services, and believe that it can maintain a low bacterial level below 1500 RLU during the warranty period. Thank you for trust and support.