Participants in the decembrist revolt wanted to establish
a constitutional monarchy
an autocracy
an absolute monarchy
a communist regime

The decembrists wanted to establish "a constitutional monarchy"

They were against serfdom that was in Russia then and wanted a liberal and a democratic way of ruling. Although they were defeated, their ideas remained and soon serfdom was indeed abolished.

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.