In 1947, two Canadian ladies left mainland China and settled in Hong Kong. At that time, Hong Kong was a centre for many people fleeing the revolution in China. Already a bustling economic hub, it became home to many poor and marginalized families. Sadie and Blanch responded to their needs and established the famous “rooftop” schools. They ensured that the children of these impoverished families not only received an education but heard the good news about Jesus. Entire families were influenced and transformed by the gospel. This spiritual and educational legacy remains alive today in two significant ministries, both named Ka Chi.