On 15th October 2018, teachers from Assumption Samutprakarn (A.S.) School of Thailand visited our school for a cross-cultural teacher development program. Teacher representatives from both schools exchanged professional ideas and the A.S. School teachers experienced the school life of a typical Hong Kong student for one day. It was a fruitful experience for all teachers involved and such kind of professional exchange should be promoted to broaden the horizon of our teachers.