I don't think the math part of the Gaokao tests memorization.
Looking at a sample paper (https://medium.com/@yujia_jo/2016-jiangsu-gaokao-national-hi...), it seems like the examination really tests for the ability to do math and problem solve under fairly heavy time pressure (150 minutes total for all questions if you are in the science stream).
Looking at a sample paper (https://medium.com/@yujia_jo/2016-jiangsu-gaokao-national-hi...), it seems like the examination really tests for the ability to do math and problem solve under fairly heavy time pressure (150 minutes total for all questions if you are in the science stream).