whiskybravo, there are 7 subjects in the Oz ATPL(A) syllabus.
Advanced Flight Theory, Maroochydore, does a very comprehensive course which is equally effective when done via distance learning.
ATPL theory courses and helicopter pilot training - Advanced Flight Theory, Australia
I believe Rob Avery's systems (and his other) textbooks can only be bought in Australia shops and as you live in China, perhaps you can find someone to buy it on your behalf.
Avfacts ATPL - Courses
A good combination is to study Rob's systems text and practice Nathan's systems exam to ensure a good mark for this rather extensive subject.