The reason these changes happened today was that there was a very real chance that pro-democracy figures would win the election in a system which was rigged aga

The reason these changes happened today was that there was a very real chance that pro-democracy figures would win the election in a system which was rigged against them. This is also why essentially all of the pro-democracy candidates were arrested under the National Security Law. They were probably going to win the LegCo and would have had the power to force the Chief Executive to resign.