Besides handling his daily work, Mr CHUI Wai-yiu (right) has to be on call at any time to deal with emergency cases, including assisting in the emergency clearance of blocked drains and watercourses.

Besides handling his daily work, Mr CHUI Wai-yiu (right) has to be on call at any time to deal with emergency cases, including assisting in the emergency clearance of blocked drains and watercourses.

Besides handling his daily work, Mr CHUI Wai-yiu (right) has to be on call at any time to deal with emergency cases, including assisting in the emergency clearance of blocked drains and watercourses.