Because Chinese propaganda has always tried to shift blame away from the cccp. cccp propaganda continually pushed the message that corona infections were due to

Because Chinese propaganda has always tried to shift blame away from the cccp. cccp propaganda continually pushed the message that corona infections were due to contaminated foreign goods (i.e. Not due to the cccp's bad healthcare policies). So to keep in line with propaganda instead of vaccinating the elderly and vulnerable they focused their efforts on vaccinating factory/Dock workers and other that handle a lot of goods. They've basically backed themselves into a corner with their propaganda, and to backtrack now would show weakness and basically admit that they care more about saving face than saving lives. As long as they can keep censoring angry citizens, and as long as they can keep the cccp in power, as far as they are concerned their covid-policy is working