Hang Seng could fall 20% over coming 6-9 months

The 2007-2008 decline was impulsive. The recovery back to marginal new Highs took over 9 years and is corrective.
I believe we may see more declines in the coming 6-9 months to test 21,500 level which is a confluence of A=C legs and is 78% of the rally from 2016 low.