Short answers, pulled from the story.
The Presidium of the General Executive Committee of the USSR passed a decree on the 28th of March 1928 attaching free territory near the Amur River to Komzet for settlement. This decision created what would become the Jewish Autonomous Oblast in the Russian Far East.
In the late 1940s, the Jewish population in the region peaked around 46,000 to 50,000 people. This represented approximately 25% of the entire population of the Jewish Autonomous Oblast at that time.
The 2021 Russian census indicated a population of only 837 ethnic Jews. This figure represents just 0.6% of the total JAO population today.
Birobidzhan is the capital and largest city of the Jewish Autonomous Oblast. It hosts state-run schools teaching Yiddish alongside other subjects and maintains a Chabad-sponsored synagogue opened in 2012.
Mount Studencheskaya located in the Bureya Range stands as the highest point of the Jewish Autonomous Oblast. The northern and western section of the oblast is mountainous with the Lesser Khingan and Bureya Range among other features.