Just for your reference
Seminar and Workshop Handouts (For Mathematics Teachers)
In the link just above, it is quite interesting to find the NSS (New senior secondary 新高中) Enriching Knowledge for the Mathematics Curriculum (Advanced Topics in Mathematics) Rainbow in Mathematics, just click and read. If secondary students could come across and understand topics mentioned in the handout like
Birch and Swinnerton-Dyer conjecture
in NSS, then HK secondary mathematics education will take the lead over this lonely planet for sure! But there’s a long way to go, at least, I just heard about (not understand) some of the names mentioned in the list above. How poor I am.