Jewish religious life in China is almost exclusively run through regional organizations and institutions. There are almost no independently-run synagogues in China; instead, religious ceremonies are conducted through regional Chabads and other centers for Jewish life in China’s major cities (the Shehebar Sephardic Center even has a branch in Shanghai.)
Kosher food can be found in China’s major cities through their Chabads and other Jewish religious institutions. The Shanghai Jewish Center has a kosher café, and the Chabad in Beijing provides Kosher meals and has a kosher market. Additionally, Beijing also has a kosher restaurant. Kosher food elsewhere is rare, if not non-existent.